AU2021204400A1

AU2021204400A1 - Cystine knot scaffold platform

Info

Publication number: AU2021204400A1
Application number: AU2021204400A
Authority: AU
Inventors: Xinxin Gao; Rami Hannoush; Harini KALUARACHCHI; Aaron Nile; Cameron NOLAND; Yingnan Zhang; Lijuan Zhou
Original assignee: Genentech Inc
Current assignee: Genentech Inc
Priority date: 2015-09-15
Filing date: 2021-06-28
Publication date: 2021-07-22
Anticipated expiration: 2036-09-15
Also published as: CN114805528A; CO2018002510A2; CN108026162B; AU2021204400B2; US20180291069A1; CL2018000668A1; UA125505C2; CN108026162A; US20200115424A1; EP3350215A1; AR106032A1; US20200325187A1; US20200140498A1; MA42828A; TW201717993A; RU2018113442A; KR20180052718A; JP2022130481A; US20170129927A1; CR20180169A

Abstract

Provided are non-naturally occurring cystine knot peptides (CKPs) that bind to VEGF-A. Additionally, provided are methods of using non-naturally occurring CKPs that bind to VEGF-A, including diagnostic and therapeutic compositions and methods. Non naturally CKPs that bind low density lipoprotein receptor-related protein 6 (LRP6) are also provided.

Description

CYSTINE KNOT SCAFFOLD PLATFORM CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the priority benefit of U.S. Provisional Application Serial No. 62/219,063, filed September 15, 2015, which is incorporated herein by reference in its entirety.

[0001a] The entire disclosure in the complete specification of our Australian Patent Application No. 2016323445 is by this cross-reference incorporated into the present specification.

SUBMISSION OF SEQUENCE LISTING ON ASCII TEXT FILE

[0002] The content of the following submission on ASCII text file is incorporated herein by reference in its entirety: a computer readable form (CRF) of the Sequence Listing (file name: 146392026840SEQLIST.txt, date recorded: September 15, 2016, size: 183 KB).

BACKGROUND OF THE INVENTION

[0003] The design and engineering of novel proteins from alternative protein scaffolds has been an emerging field in the last decade with a broad spectrum of applications ranging from structure biology and imaging tools to therapeutic reagents that are currently being tested in the clinic (HK Binz et al., Nat Biotechnol 23, 1257-1268, 2005; HK Binz and A Pluckthun, Curr Opin Biotechnol 16, 459-469, 2005; SS Sidhu and S Koide, Curr Opin Struct Biol 17, 481-487, 2007; A Skerra, Curr Opin Biotechnol 18, 295-304, 2007; C Gronwall and S Stahl, JBiotechnol 140, 254-269, 2009; T Wurch et al., Trends Biotechnol , 575-582, 2012; S Banta et al., Annu Rev Biomed Eng 15, 93-113, 2013).

[0004] Desirable physical properties of potential alternative scaffold molecules include high thermal stability and reversibility of thermal folding and unfolding. Several methods have been applied to increase the apparent thermal stability of proteins and enzymes, including rational design based on comparison to highly similar thermostable sequences, design of stabilizing disulfide bridges, mutations to increase a-helix propensity, engineering of salt bridges, alteration of the surface charge of the protein, directed evolution, and composition of consensus sequences (Lehmann and Wyss, Cur Open Biotechnology 12, 371 375,2001).

[0005] Cystine-knot peptides come from a wide range of sources and exhibit diverse pharmacological activities. They are roughly 30-50 amino acids in length and contain six conserved cysteine residues which form three disulfide bonds. One of the disulfides penetrates the macrocycle which is formed by the two other disulfides and their interconnecting backbones, thereby yielding a characteristic knotted topology with multiple loops exposed on the surface. The loops are defined as the amino acid regions which flank the six conserved cysteine residues and are highly variable in nature. Furthermore, the unique arrangement of the disulfide bonds renders cystine-knot peptides highly stable to thermal, proteolytic and chemical degradation.

[00061 Thus, there is a need to develop small, stable, artificial antibody-like molecules for a variety of therapeutic and diagnostic applications, such as ocular diseases and disorders. The present invention meets this and other needs.

[0006a] It is to be understood that if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art in Australia or any other country.

BRIEF SUMMARY OF THE INVENTION

[00071 In certain embodiments, provided herein is a non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A), wherein the CKP comprises the cystine scaffold structure: ZiCiL1C2L2C3L3C4L4C5L5C6Z2 wherein:

ZiandZ2are any amino acid; Li is Loop 1 and has a structure selected from the group consisting of: XiX2X3X4X5X6(SEQ ID NO: 2),XiX2X3X4X5X6X7 (SEQ ID NO: 3),XiX2X3X4XX6X7X8

(SEQ ID NO: 4),XiX2X3X4X5X6X7X8X9(SEQ ID NO: 5), andXiX2X3X4XX6X7XX9XO (SEQ ID NO: 6), wherein each of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure:XiX2X3X4X5 (SEQ ID NO: 7), wherein each of Xi - X 5 is any amino acid or an unnatural amino acid; L3 is Loop 3 and has the structure:XiX 2X 3 ,wherein each of Xi- X3 is any amino acid or an unnatural amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid or an unnatural amino acid; L5 is Loop 5 and has the structure:XiX2X3X4X5 (SEQ ID NO: 7), wherein each of Xi - X 5 is any amino acid or an unnatural amino acid; wherein the unnatural amino acid is selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4-fluorophenylalanine; and wherein the CKP binds to VEGF-A with an affinity of 500 pM or better.

[0008] In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring (CKP) that binds to VEGF-A has an altered disulfide bond connectivity-with reference to a wild-type Ecballium elaterium trypsin inhibitor EETI-II protein having the amino acid sequence set forth in SEQ ID NO: 1; wherein the altered disulfide bond connectivity is C1-C4, C2-C3 and C5-C6.

[0009] In certain embodiments according to (or as applied to) any of the embodiments above, the unnatural amino acid is selected from the group consisting of L-propargylglycine PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine,-L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

[00101 In certain embodiments according to (or as applied to) any of the embodiments above, Zi and/or Z2 is more than one amino acid, or an unnatural amino acid. In certain embodiments, Z2 is two amino acids. In certain embodiments, Z2is three amino acids.

[0011] In certain embodiments according to (or as applied to) any of the embodiments above, Zi and/or Z2 is G.

3 17800220_1 (GHMattes) P108077.AU.1

[00121 In certain embodiments according to (or as applied to) any of the embodiments above, in Li,X 3 is not I;X5 is not M; and/orX6 is not R. In certain embodiments according to (or as applied to) any of the embodiments above, in LI: Xi is an amino acid selected from P, Q, R, T, V, D, N, K, L, and X;X 2 is an amino acid selected from T, D, L, V, I, R, P, N and X; X 3 is an amino acid selected from T, P, M, L, S, F, R, and X;X 4 is an amino acid selected from R, T, Q, D, W, L, E, S, K, and X;X5 is an amino acid selected from F, P, V, E, K, L, I, and X;X 6 is an amino acid selected from K, N, F, P, L, Y, T, D, M, and X;X 7 is an amino acid selected from Q, W, H and/X; and/or X 8 is an amino acid selected from Y, A, G, D, E, W, S, and X, wherein X is and unnatural amino acid is selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4-fluorophenylalanine. In certain embodiments according to (or as applied to) any of the embodiments above, in LI: X9 is an amino acid selected from L, I, V, D, E and X, wherein X is and unnatural amino acid is selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3 fluorotyrosine, and L-4-fluorophenylalanine. In certain embodiments according to (or as applied to) any of the embodiments above, in LI: Xio is an amino acid selected from Y, T, M, N, F, and X, wherein X is and unnatural amino acid is selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4-fluorophenylalanine.

[0013] In certain embodiments according to (or as applied to) any of the embodiments above, X is and unnatural amino acid is selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(i-N-methyl indole)-L-alanine, 3-(i-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as

L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

[0014] In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi - X 5 is any amino acid with the exception that X2 is not proline (P). In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi - X5 is any amino acid with the exception that X 4 is not glycine (G). In certain embodiments according to (or as applied to) any of the embodiments above, in L5: Xi is an amino acid selected from G, Q, H, R, L, and Q; X 2 is an amino acid selected from P, M, W, Y, F, L, and H; X3 is an amino acid selected from N, F, H, and Y; X4 is an amino acid selected from G, Q, D, N, K, H, E, and S; and/or X5 is an amino acid selected from F, S, and T.

[0015] In certain embodiments according to (or as applied to) any of the embodiments above, Li has the structure XiX2X3X4X5X6X7X (SEQ ID NO: 4), wherein: Xi is an amino acid selected from P, Q, and R; X 2 is an amino acid selected from T, L, and D; X3 is an amino acid selected from T, M and L; X 4 is an amino acid selected from R, Q, and D; X5 is an amino acid selected from F, P, and V; X6 is an amino acid selected from K and F; X7 is an amino acid selected from Q and W; and X 8 is an amino acid selected from Y, G, and D. In certain embodiments according to (or as applied to) any of the embodiments above, Li has the structure XiX2X3X4XX6X7X X9 Xi (SEQ ID NO: 6), wherein: Xi is an amino acid selected from Q, R, T and V; X2 is an amino acid selected from T and D; X 3 is P; X 4 is an amino acid selected from T and W; X 5 is an amino acid selected from F, E, P, and K; X6 is an amino acid selected from N and P; X 7 is an amino acid selected from W and H; X8 is an amino acid selected from A, D, E, and W; X9 is an amino acid selected from L and I; and Xi is an amino acid selected from Y, T, M and N.

[0016] In certain embodiments according to (or as applied to) any of the embodiments above, in L5: Xi is an amino acid selected from G, H, and Q; X2 is an amino acid selected from P, M, W, and Y; X3 is an amino acid selected from N and Y; X 4 is an amino acid selected from G, Q, and S; andX5 is an amino acid selected from F and S.

[0017] In certain embodiments according to (or as applied to) any of the embodiments above, Li has the structure XiX2X3X4X5X6X7X (SEQ ID NO: 4), wherein: Xi is an amino acid selected from D, Q, N, and K; X2 is an amino acid selected from V, I, R, L, and P; X3 is an amino acid selected from L, S, M, T, and F; X4 is an amino acid selected from Q, L, and E; X 5 is P; X6 is an amino acid selected from F, L, and Y; X7 is W; and X8 is G.

[00181 In certain embodiments according to (or as applied to) any of the embodiments above, in L5: X 3 is Y; X5 is S; and Xi, X 2 and X 4 are each any amino acid, with the exception that Xi is not G, X 2 is not P, X 4 is not G, and/or X5 is not F. In certain embodiments according to (or as applied to) any of the embodiments above, in L5: Xi is an amino acid selected from H, L, R, and Q; X2 is an amino acid selected from W, F, and Y; X 3 is Y; X 4 is an amino acid selected from Q, N, K, H, and E; and X5 is S.

[0019] In certain embodiments according to (or as applied to) any of the embodiments above, Li has the structure XiX2X3X4X5X6X7X8X9 Xi (SEQ ID NO: 6), wherein: Xi is an amino acid selected from K, Q, L, and R; X 2 is an amino acid selected from N and D; X3 is an amino acid selected from P and L; X4 is an amino acid selected from L, T, S and K; X5 is an amino acid selected from F, V, I, and L; X6 is an amino acid selected from N and D; X7 is W; X 8 is an amino acid selected from A and S; X9 is an amino acid selected from L, V, E and D; and Xio is an amino acid selected from Y and F.

[0020] In certain embodiments according to (or as applied to) any of the embodiments above, in L5: X1 is Q; X 2 is an amino acid selected from L, F, M, and H; X3 is an amino acid selected from F, Y, and H; X4 is an amino acid selected from D, Q, N, and K; and X5 is an amino acid selected from S and T.

[0021] In certain embodiments according to (or as applied to) any of the embodiments above, in L2, Xi is K, X2 is Q, X3 is D, X4 is S, and X5 is D.

[0022] In certain embodiments according to (or as applied to) any of the embodiments above, Li has the structure XiX2X3X4X5X6X7X (SEQ ID NO: 4), wherein: X5 is P; X7 is W; X8 is G; and wherein Xi, X2, X3, X4 and X6 are each any amino acid, with the exception that X1 is not P, X2 is not R, X3 is notI, and/or X6 is not R. In certain embodiments according to (or as applied to) any of the embodiments above, L has the structure XX2 X 3 X 4XX 6X 7 X (SEQ ID NO: 4), wherein: Xi is an amino acid selected from N and D; X2 is an amino acid selected from I and V; X3 is an amino acid selected from M and L; X 4 is an amino acid selected from L, Q, D and K; X5 is P; X6 is an amino acid selected from F, Y, T, L, and M; X7 is W; and X8 is G.

[0023] In certain embodiments according to (or as applied to) any of the embodiments above, in L5: Xi is an amino acid selected from Q, H, L, and R; X2 is an amino acid selected from Y and W; X3 is Y; X4 is an amino acid selected from Q and N; andX5 is S. In certain embodiments according to (or as applied to) any of the embodiments above, in L5: X 3 is Y;

X5 is S; and Xi,X2, andX4are each any amino acid, with the exception that: Xi is not G,X 2 is not P, and/orX4 is not G.

[0024] In certain embodiments according to (or as applied to) any of the embodiments above, in L2: Xi is an amino acid selected from G or E;X2 is an amino acid selected from Q, L, P, R, E, and M;X 3 is an amino acid selected from S, D, and N;X4 is an amino acid selected from F, Y, L, M, and I; and/orX5 is an amino acid selected from E, D, Q, L, and S,

[0025] In certain embodiments according to (or as applied to) any of the embodiments above, in L3, Xi is L,X2 is A, andX3 is G.

[0026] In certain embodiments according to (or as applied to) any of the embodiments above, in L4, X1 is V or F.

[00271 In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi- X 5 is any amino acid with the exception thatX2is not proline (P).

[0028] In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi- X 5 is any amino acid with the exception thatX4is not glycine (G).

[0029] In certain embodiments according to (or as applied to) any of the embodiments above, in L5: Xi is any amino acid except G;X2 is any amino acid except P;X3 is any amino acid except N;X4 is any amino acid except G; and/orX5 is any amino acid except F.

[0030] In certain embodiments according to (or as applied to) any of the embodiments above, LI has the structureXiX2X3X4XsXX7X (SEQ ID NO: 4), wherein Xi is an amino acid selected from N, D, and X;X2 is an amino acid selected from I, V, and X;X3 is M or X; X 4 is an amino acid selected from L, Q, and X;X 5 is P or X;X6 is F, Y, or X;X7 is W or X; and X 8 is G or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4-fluorophenylalanine.

[0031] In certain embodiments according to (or as applied to) any of the embodiments above, X is and unnatural amino acid is selected from the group consisting of L propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine,

3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

[0032] In certain embodiments according to (or as applied to) any of the embodiments above, in L3, each of Xi - X 3 is any amino acid or unnatural amino acid with the exception that Xi is not Leucine (L), X 2 is not Alanine (A), and X 3 is not glycine (G), wherein the unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, and L-4-fluorophenylalanine. In certain embodiments according to (or as applied to) any of the embodiments above, in L3: Xi is an amino acid selected from M, F, L V, and X; X2 is an amino acid selected from S, N, Q, I, Y, E, V, T, and X; X 3 is an amino acid selected from D, Q, T, N, E, R, and X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3 fluorotyrosine, and L-4-fluorophenylalanine.

[0033] In certain embodiments according to (or as applied to) any of the embodiments above, in L4, Xi is any amino acid except V or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1 naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4 fluorophenylalanine. In certain embodiments according to (or as applied to) any of the embodiments above, in L4, Xi is I, L, or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1 naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4 fluorophenylalanine.

[0034] In certain embodiments according to (or as applied to) any of the embodiments above, in L5: X 3 is Y or X; X5 is S or X; and Xi, X 2 , and X 4 are each any amino acid or X, with the exception that Xi is not G, X2 is not P, and/or X4 is not G, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L-sulfotyrosine,

L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3 fluorotyrosine, and L-4-fluorophenylalanine. In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi - X 5 is any amino acid with the exception that X2 is not proline (P). In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi - X 5 is any amino acid with the exception that X4 is not glycine (G). In certain embodiments according to (or as applied to) any of the embodiments above, in L5: Xi is an amino acid selected from Q, H, and X; X 2 is an amino acid selected from Y, W, and X; X 3 is Y or X; X 4 is an amino acid selected from Q, N, or X; X5 is S or X, wherein X is an unnatural amino acid selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4-fluorophenylalanine.

[0035] In certain embodiments according to (or as applied to) any of the embodiments above, X is and unnatural amino acid is selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

[0036] In certain embodiments according to (or as applied to) any of the embodiments above, in L2: Xi is G or X; X 2 is R, P, or X; X 3 is D or X; X4 is F, I, or X; and X5 is E, D, or X, wherein X is an unnatural amino acid selected from the group consisting of L propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, and L-4-fluorophenylalanine.

[00371 In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECLQQCICQYYQSCG (SEQ ID NO: 103). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECVERCICQYYQSCG (SEQ ID NO: 104). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 105). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECMNQCICQYYQSCG (SEQ ID NO: 106). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECMQTCICQYYQSCG (SEQ ID NO: 107). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECVYQCICQYYQSCG (SEQ ID NO: 108). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECFINCICQYYQSCG (SEQ ID NO: 109). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 110). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECVTECICQYYQSCG (SEQ ID NO: 111). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECFYECICQYYQSCG (SEQ ID NO: 112). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 113). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPFWGCGRDFECVYRCICQYYQSCG (SEQ ID NO: 114). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCDVMQPYWGCGPDIDCFVRCLCHWYNSCG (SEQ ID NO: 139). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCDVMQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 140). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIMLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 142). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIXLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 144), wherein X is norleucine (Nle). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIXLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 145), wherein X is norleucine (Nle). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCNIXLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 146), wherein X is norleucine (Nle).

[00381 In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A) comprises the amino acid sequence GCDVXQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 224), wherein X is norleucine.

[00391 In certain embodiments, provided is a non-naturally occurring cystine knot peptide (CKP) comprising the amino acid selected from the group consisting of: GCNIMLPFWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 113), GCNIMLPFWGCGRDFECVYRCICQYYQSCG (SEQ ID NO: 114), GCDVMQPYWGCGPDIDCFVRCLCHWYNSCG (SEQ ID NO: 139), GCDVMQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 140), GCNIMLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 142), GCNIXLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 144), wherein X is norleucine (Nle), GCNIXLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 145), wherein X is norleucine (Nle), GCNIXLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 146), wherein X is norleucine (Nle), and GCDVXQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 224), wherein X is norleucine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIMLPFWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 113). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIMLPFWGCGRDFECVYRCICQYYQSCG (SEQ ID NO: 114). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCDVMQPYWGCGPDIDCFVRCLCHWYNSCG (SEQ ID NO: 139). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCDVMQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 140). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP

12 17800220_1 (GHMattes) P108077.AU.1 comprises the amino acid sequence set forth in GCNIMLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 142). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 144), wherein X is norleucine (Nle). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 145), wherein X is norleucine (Nle). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 146), wherein X is norleucine (Nle). In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCDVXQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 224), wherein X is norleucine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP binds VEGF-A.

[0040] In certain embodiments, provided is a non-naturally occurring cystine knot peptide (CKP) comprising the amino acid selected from the group consisting of: GCDVXiQPYWGCGPDI-D/E-CLS-N/K/X2-CICHWYNSCG (SEQ ID NO: 534), GCDVXiQPYWGCGPDI-N/K/X2-CLS-D/E-CICHWYNSCG (SEQ ID NO: 535), GCNIXiLPYWGCGRDF-D/E-CME-N/K/X2-CICQYYQSCG (SEQ ID NO: 538), GCNIXiLPYWGCGRDF-N/K/X2-CME-D/E-CICQYYQSCG (SEQ ID NO: 539), GCNIXiLPFWGCGRDF-D/E-CVS-N/K/X2-CICQYYQSCG (SEQ ID NO: 540), and GCNIXiLPFWGCGRDF-N/K/X2-CVS-D/E-CICQYYQSCG (SEQ ID NO: 541), wherein Xi is norleucine and X 2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCDVXiQPYWGCGPDI-D/E-CLS-N/K/X2-CICHWYNSCG (SEQ ID NO: 534), wherein Xi is norleucine and X2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCDVXQPYWGCGPDIDCLSKCICHWYNSCG (SEQ ID NO: 536), wherein X is norleucine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCDVXiQPYWGCGPDIDCLSX2CICHWYNSCG (SEQ ID NO: 537), wherein Xi is norleucine and X 2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCDVXiQPYWGCGPDI-N/K/X2-CLS-D/E-CICHWYNSCG (SEQ ID NO: 535), wherein Xi is norleucine and X2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXiLPYWGCGRDF-D/E-CME-N/K/X2-CICQYYQSCG (SEQ ID NO: 538), wherein Xi is norleucine and X2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXLPYWGCGRDFECMEKCICQYYQSCG (SEQ ID NO: 543), wherein X is norleucine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXiLPYWGCGRDFECMEX2CICQYYQSCG (SEQ ID NO: 544), wherein Xi is norleucine and X 2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXiLPYWGCGRDF-N/K/X2-CME-D/E-CICQYYQSCG (SEQ ID NO: 539), wherein Xi is norleucine and X2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXiLPFWGCGRDF-D/E-CVS-N/K/X2-CICQYYQSCG (SEQ ID NO: 540), wherein Xi is norleucine and X 2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXLPFWGCGRDFECVSKCICQYYQSCG (SEQ ID NO: 545), wherein X is norleucine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXiLPFWGCGRDFECVSX2CICQYYQSCG (SEQ ID NO: 546),wherein Xi is norleucine and X 2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP comprises the amino acid sequence set forth in GCNIXiLPFWGCGRDF-N/K/X2-CVS-D/E-CICQYYQSCG (SEQ ID NO: 541), wherein Xi is norleucine and X 2 is ornithine. In certain embodiments according to (or as applied to) any of the embodiments above, the CKP binds VEGF-A.

[0041] In certain embodiments according to (or as applied to) any of the embodiments above, provided is a non-naturally occurring cystine knot peptide (CKP) that binds to VEGF A, wherein the CKP comprises the cystine scaffold structure: ZiCiL1C2L2C3L3C4L4C5L5C6Z2 wherein:

Zi and Z2 are any amino acid;

Li is Loop 1 and has a structure selected from the group consisting of: XiX2X3X4X5X6X7X, XiX 2X 3 X 4 X 5X 6X 7 XX9 , and XiX 2 X 3 X4 X 5X 6X 7X 8X 9Xio, wherein each

of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure: XiX2X3X4X, wherein each of Xi - X5 is any amino acid; L3 is Loop 3 and has the structure: XiX 2X 3 wherein each of Xi - X3 is any amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid; L5 is Loop 5 and has the structure: XiX 2X 3 X 4 X, wherein each of Xi - X5 is any amino acid; wherein the CKP has an altered disulfide bond connectivity with reference to a wild type Ecballium elaterium trypsin inhibitor EETI-II protein having the amino acid sequence set forth in SEQ ID NO: 1; wherein the altered disulfide bond connectivity is C1-C4, C2-C3 and C5-C6; and wherein the CKP has a percent alpha helix content of at least 20%.

[0042] In certain embodiments according to (or as applied to) any of the embodiments above, Zi and Z 2 are any amino acid, more than one amino acid, or an unnatural amino acid. In certain embodiments according to (or as applied to) any of the embodiments above, each of Xi - Xio in LI is any amino acid or an unnatural amino acid. In certain embodiments according to (or as applied to) any of the embodiments above, each of Xi - X5 in L2 is any amino acid or an unnatural amino acid. In certain embodiments according to (or as applied to) any of the embodiments above, each of Xi - X3 in L3 is any amino acid or an unnatural amino acid. In certain embodiments according to (or as applied to) any of the embodiments above, Xi in L4 is any amino acid or an unnatural amino acid. In certain embodiments according to (or as applied to) any of the embodiments above, each of Xi - X5 in L5 is any amino acid or an unnatural amino acid. In certain embodiments, the unnatural amino acid is selected from the group consisting of: L-propargylglycine-PEG6-, L-sulfotyrosine, L norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3 fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl) L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4 difluoro-L-phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl L-phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L alanine, 3-(5-aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4' biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)

L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

[0043] In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring (CKP) that binds to VEGF-A binds to VEGF-A with an affinity of 500 pM or less. In certain embodiments according to (or as applied to) any of the embodiments above, the binding affinity is determined via surface plasmon resonance.

[0044] In certain embodiments according to (or as applied to) any of the embodiments above, Zi and/or Z 2 is more than one amino acid, or an unnatural amino acid. In certain embodiments, Z 2 is two amino acids. In certain embodiments, Z 2 is three amino acids. In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi - X5 is any amino acid with the exception that X 2 is not proline (P). In certain embodiments according to (or as applied to) any of the embodiments above, in L5, each of Xi - X 5 is any amino acid with the exception that X 4 is not glycine (G).

[0045] In certain embodiments according to (or as applied to) any of the embodiments above, the C-terminal carboxyl group of the non-naturally occurring (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments according to (or as applied to) any of the embodiments above, the N-terminal amine group of the non-naturally occurring (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments according to (or as applied to) any of the embodiments above, the C-terminal carboxyl group of the non-naturally occurring (CKP) that binds to VEGF-A is capped and the N-terminal amine group of the non-naturally occurring (CKP) that binds to VEGF-A is modified (such as capped).

[0046] In certain embodiments according to (or as applied to) any of the embodiments above, the C-terminal carboxyl group of the non-naturally occurring (CKP) that binds to VEGF-A is amidated. In certain embodiments according to (or as applied to) any of the embodiments above, the N-terminal amine group of the non-naturally occurring (CKP) that binds to VEGF-A is acetylated. In certain embodiments according to (or as applied to) any of the embodiments above, the C-terminal carboxyl group of the non-naturally occurring (CKP) that binds to VEGF-A is amidated and the N-terminal amine group of the non-naturally occurring (CKP) that binds to VEGF-A is acetylated.

[00471 In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring (CKP) that binds to VEGF-A inhibits VEGF-A activity. In certain embodiments according to (or as applied to) any of the embodiments above, CKP inhibits VEGF-A activity with and ICo between about 0.5 nM and about 1.0 nM. In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring EETI-II scaffold protein binds human VEGF-A, mouse VEGF-A, and rat VEGF-A.

[0048] In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring CKP competes with the antibody G6.31 for binding to VEGF-A. In certain embodiments according to (or as applied to) any of the embodiments above, provided is a non-naturally occurring CKP that competes with the non-naturally occurring (CKP) that binds to VEGF-A of any one of embodiments above for binding to VEGF-A.

[0049] In certain embodiments according to (or as applied to) any of the embodiments above, non-naturally occurring CKP that binds to an epitope on VEGF-A comprising at least one of the amino acid residues selected from the group consisting of: V14, V15, F17, D19, Y21, Q22, Y25,146, K48, N62, D63, L66, M81,183, K84, P85, H86, G88, Q89,191, C104, R105, and P106.

[0050] In certain embodiments according to (or as applied to) any of the embodiments above, the residues are selected from the group consisting of: K48, N62, and D63. In certain embodiments according to (or as applied to) any of the embodiments above, the residues are selected from the group consisting of: Y21, Y25, and P106. In certain embodiments according to (or as applied to) any of the embodiments above, the residues are selected from the group consisting of: H86 and Q89. In certain embodiments according to (or as applied to) any of the embodiments above, the residues are selected from the group consisting of: M81, D19, and Q22. In certain embodiments according to (or as applied to) any of the embodiments above, the residues are selected from the group consisting of: F17, M81, and 191. In certain embodiments according to (or as applied to) any of the embodiments above, the residues are selected from the group consisting of: V14, F17, D19, Q22, M81, and 191. In certain embodiments according to (or as applied to) any of the embodiments above, the residues are selected from the group consisting of: Y25.

[0051] In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring CKP that binds to VEGF-A is conjugated to a therapeutic agent. In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring CKP that binds to VEGF-A is conjugated to a label. In certain embodiments according to (or as applied to) any of the embodiments above, the label is selected from the group consisting of a radioisotope, a fluorescent dye, and an enzyme.

[0052] In certain embodiments according to (or as applied to) any of the embodiments above, provided is an isolated nucleic acid encoding the non-naturally occurring (CKP) that binds to VEGF-A of any one of embodiments above. Also provided is an expression vector encoding the nucleic acid molecule of any one of the embodiments above. Also provided is a cell comprising the expression vector of any one of the embodiments above. Also provided is a method of producing the non-naturally occurring (CKP) that binds to VEGF-A of any one of embodiments above, comprising culturing the cell of any one of the embodiments above, and recovering the non-naturally occurring (CKP) that binds to VEGF-A from the cell culture.

[0053] Also provided is a method of producing the non-naturally occurring (CKP) that binds to VEGF-A of any one of embodiments above, comprising chemically synthesizing the non-naturally occurring (CKP) that binds to VEGF-A.

[0054] Provided herein is a composition comprising the non-naturally occurring (CKP) that binds to VEGF-A of any one of the embodiments above and a pharmaceutically acceptable carrier. In certain embodiments according to (or as applied to) any of the embodiments above, the composition comprises one or more additional compounds. In certain embodiments according to (or as applied to) any of the embodiments above, the additional compound binds to a second biological molecule selected from the group consisting of interleukin-6 (IL-6); interleukin-6 receptor (IL-6R); PDGF; angiopoietin; angiopoietin 2; Tie2; SP; integrins av3, av35, and 5 P1; betacellulin; apelin/APJ; erythropoietin; complement factor D; TNFa; HtrAl; a VEGF receptor; ST-2 receptor; and proteins genetically linked to age-related macular degeneration (AMD) risk such as complement pathway components C2, factor B, factor H, CFHR3, C3b, C5, C5a, C3a, HtrAl, ARMS2, TIMP3, HLA, interleukin-8 (IL-8), CX3CR1, TLR3, TLR4, CETP, LIPC, COL1OA1, and TNFRSF1OA. In certain embodiments according to (or as applied to) any of the embodiments above, the additional compound is a non-naturally occurring CKP. In certain embodiments according to (or as applied to) any of the embodiments above, the additional compound is an antibody or antigen-binding fragment thereof.

[0055] Provided herein is a method of treating an ocular disease characterized by angiogenesis and/or vascular permeability or leakage in a subject, comprising administering an effective amount of the non-naturally occurring (CKP) that binds to VEGF-A of any one of embodiments above to the subject. In certain embodiments according to (or as applied to) any of the embodiments above, the method further comprises administering one or more additional compounds. In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring CKP that binds to VEGF-A is administered simultaneously with the additional compound(s). In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring CKP that binds to VEGF-A is administered before or after the additional compound(s). In certain embodiments according to (or as applied to) any of the embodiments above, the additional compound binds to a second biological molecule selected from the group consisting of interleukin-6 (IL-6); interleukin-6 receptor (IL-6R); PDGF; angiopoietin; angiopoietin 2; Tie2; SIP; integrins av33, av35, and a5p1; betacellulin; apelin/APJ; erythropoietin; complement factor D; TNFa; HtrAl; a VEGF receptor; ST-2 receptor; and proteins genetically linked to age-related macular degeneration (AMD) risk such as complement pathway components C2, factor B, factor H, CFHR3, C3b, C5, C5a, C3a, HtrAl, ARMS2, TIMP3, HLA, interleukin-8 (IL-8), CX3CR1, TLR3, TLR4, CETP, LIPC, COL1OA1, and TNFRSF1OA. In certain embodiments according to (or as applied to) any of the embodiments above, the additional compound is a non-naturally occurring CKP. In certain embodiments according to (or as applied to) any of the embodiments above, the additional compound is an antibody or antigen-binding fragment thereof. In certain embodiments according to (or as applied to) any of the embodiments above, the ocular disease is an intraocular neovascular disease selected from the group consisting of proliferative retinopathies, choroidal neovascularization (CNV), age-related macular degeneration (AMD), diabetic and other ischemia-related retinopathies, diabetic macular edema, pathological myopia, von Hippel-Lindau disease, histoplasmosis of the eye, retinal vein occlusion (RVO), including Central Retinal Vein Occlusion (CRVO) and branched retinal vein occlusion (BRVO), corneal neovascularization, retinal neovascularization, and retinopathy of prematurity (ROP).

[0056] In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring (CKP) that binds to VEGF-A or the composition is administered to the subject via an implantable device. In certain embodiments according to (or as applied to) any of the embodiments above, the implantable device selected from the group consisting of: an ocular insert, a slow-release depot, an ocular plug/reservoir, an non biodegradable ocular implant or a biodegradable ocular implant.

[00571 In certain embodiments according to (or as applied to) any of the embodiments above, provided is a composition comprising the non-naturally occurring (CKP) that binds to VEGF-A of any one of embodiments above for use in treating an ocular disease characterized by angiogenesis and/or vascular permeability or leakage in a subject. In certain embodiments according to (or as applied to) any of the embodiments above, the ocular disease is an intraocular neovascular disease selected from the group consisting of proliferative retinopathies, choroidal neovascularization (CNV), age-related macular degeneration (AMD), diabetic and other ischemia-related retinopathies, diabetic macular edema, pathological myopia, von Hippel-Lindau disease, histoplasmosis of the eye, retinal vein occlusion (RVO), including Central Retinal Vein Occlusion (CRVO) and branched retinal vein occlusion (BRVO), corneal neovascularization, retinal neovascularization, and retinopathy of prematurity (ROP). In certain embodiments according to (or as applied to) any of the embodiments above, the composition is administered to the subject via an implantable device. In certain embodiments according to (or as applied to) any of the embodiments above, the implantable device selected from the group consisting of: an ocular insert, a slow-release depot, an ocular plug/reservoir, an non-biodegradable ocular implant or a biodegradable ocular implant.

[0058] In certain embodiments according to (or as applied to) any of the embodiments above, provided is a composition comprising the non-naturally occurring (CKP) that binds to VEGF-A of any one of embodiments above for use in treating an ocular disease characterized by angiogenesis and/or vascular permeability or leakage in a subject. In certain embodiments according to (or as applied to) any of the embodiments above, the ocular disease is an intraocular neovascular disease selected from the group consisting of proliferative retinopathies, choroidal neovascularization (CNV), age-related macular degeneration (AMD), diabetic and other ischemia-related retinopathies, diabetic macular edema, pathological myopia, von Hippel-Lindau disease, histoplasmosis of the eye, retinal vein occlusion (RVO), including Central Retinal Vein Occlusion (CRVO) and branched retinal vein occlusion (BRVO), corneal neovascularization, retinal neovascularization, and retinopathy of prematurity (ROP). In certain embodiments according to (or as applied to) any of the embodiments above, the medicament is administered to the subject via an implantable device. In certain embodiments according to (or as applied to) any of the embodiments above, the implantable device selected from the group consisting of: an ocular insert, a slow-release depot, an ocular plug/reservoir, an non-biodegradable ocular implant or a biodegradable ocular implant.

[0059] In certain embodiments according to (or as applied to) any of the embodiments above, the non-naturally occurring (CKP) that binds to VEGF-A is formulated for long acting delivery.

[00601 Provided herein is a formulation comprising the non-naturally occurring (CKP) that binds to VEGF-A of any of embodiments above and PLGA. In certain embodiments according to (or as applied to) any of the embodiments above, the PLGA is a PLGA rod.

[0061] Also provided herein is a non-naturally occurring cystine knot peptide (CKP) that binds to human low density lipoprotein receptor-related protein 6 (LRP6), wherein the CKP comprises the cystine scaffold structure: ZiCiL C2L2C3L3C4L4C5L5C6Z2; wherein:

Zi and Z2 are any amino acid; Li is Loop 1 and has a structure selected from the group consisting of: X1X2X3X4X 5X6, XiX2X 3X 4X 5X 6X 7, X1X 2X 3X4X 5X 6X 7X 8, XX2X 3X 4XX 6X 7X8 X 9, and

XiX2X3X4X5X6X7XX9Xi, wherein each of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure: XIX2X3X4X, wherein each of Xi - X5 is any amino acid; L3 is Loop 3 and has the structure: XX2X3 wherein each of Xi - X3 is any amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid; and L5 is Loop 5 and has the structure: XIX2X3X4X, wherein each of Xi - X5 is any amino acid.

[00621 In certain embodiments according to (or as applied to) any of the embodiments above, Zi and/or Z2 is more than one amino acid, or an unnatural amino acid. In certain embodiments, Z2 is two amino acids. In certain embodiments, Z2is three amino acids.

[0063] In certain embodiments according to (or as applied to) any of the embodiments above, Zi and/or Z2 is G.

[0064] In certain embodiments according to (or as applied to) any of the embodiments above, in Li: Xi is an amino acid selected from R, V, M, A, G, N, S, and E; X2 is an amino acid selected from T, N, S, G, R, and A; X3 is an amino acid selected from N, R, H, V, K, S, G, I, and Y; X4 is an amino acid selected from R, V, N, I, K, S, and T; X5 is an amino acid selected from V, R, K, I, T, S, L, and N; and X6 is an amino acid selected from K, G, A, I, R,

21 17800220_1 (GHMatters) P108077.AU.1

N, S, and V. In certain embodiments according to (or as applied to) any of the embodiments above, in Li:X7 is an amino acid selected from G, R, K, E, P, and T. In certain embodiments according to (or as applied to) any of the embodiments above, in LI: X8 is an amino acid selected from G, R, K, Q, A, and S. In certain embodiments according to (or as applied to) any of the embodiments above, in LI: X9 is an amino acid selected from R or G. In certain embodiments according to (or as applied to) any of the embodiments above, in LI: Xio is an amino acid selected from E, W, and G.

[0065] In certain embodiments according to (or as applied to) any of the embodiments above, in L5: Xi is an amino acid selected from G, S, N, Y, A, and R;X2 is an amino acid selected from P, G, S, V, E, R, F, and D;X 3 is an amino acid selected from N, G, S, E, P, K, H, and R;X 4 is an amino acid selected from G, R, H, S, Q, V, and D; andX5 is an amino acid selected from F, D, N, R, G, Y, S, and T.

[0066] In certain embodiments according to (or as applied to) any of the embodiments above, in L2, Xi is K, X2 is Q, X 3 is D,X4 is S, andX5 is D. In certain embodiments according to (or as applied to) any of the embodiments above, in L3, Xi is L,X2 is A, andX3 is G. In certain embodiments according to (or as applied to) any of the embodiments above, in L4, Xi is V.

BRIEF DESCRIPTION OF THE DRAWINGS

[0067] FIG. 1 depicts the structure of the EETI-II cystine knot protein.

[0068] FIG. 2A shows the results of experiments that were performed to determine whether EGFCKP9.54.90disrupts the interaction between VEGF-A(8-109) and KDR; VEGF-A(8-109) and Flt-1; VEGF-A 165 and KDR; VEGF-B and Flt-1; VEGF-C and Flt-4; VEGF-D and Flt-4; and PIGF-2 and FLT-1.

[00691 FIG. 2B shows the results of experiments that were performed to determine whether EGFCKP9.54.90disrupts the interaction between VEGF-A(8-109) and KDR; VEGF-A(8-109) and Flt-1; VEGF-A 165 and KDR; EGF and EGFR; PDGF and PDGFR; NGF and NGFR; and IGF and IGFR.

[0070] FIG. 3 shows the results of experiments performed to determine whether VEGFCKP9.54.90,VEGFCKP9.54, and VEGFCKP9.63.12 inhibit trypsin protease activity.

[0071] FIG. 4 shows the results of experiments performed to determine whether VEGF_CKP9.54.90 and VEGFCKP9.63.12 are resistant to trypsin digestion.

[00721 FIG. 5 depicts the structure of VEGF_CKP9.54.90, the structure of wild type EETI-II, and provides schematics that compare the VEGF-binding CKP variant's disulfide bond connectivity pattern to that of wild type EETI-II.

[0073] FIG. 6 depicts the co-crystal structure of VEGFCKP9.54.90 in complex with VEGF-A.

[0074] FIG. 7 depicts space filling models that show binding interfaces of VEGFCKP9.54.90, antibody G6.31, and domain 2 of Flt-2 on VEGF-A.

[0075] FIG 8 depicts ribbon diagram models that show binding interfaces of VEGFCKP9.54.90, antibody G6.31, and domain 2 of Flt-2 on VEGF-A.

[0076] FIG. 9 shows contact residues on VEGF-A at the interacting surface between VEGF-A and VEGFCKP9.54.90.

[0077] FIG. 10 shows the binding interfaces of bevacizumab Fab, Z-domain, and receptor-blocking peptide v108 on VEGF-A.

[0078] FIG. 11 provides the results of an experiment that was performed to determine the effects of amino acid substitution mutations in VEGF-A on binding of VEGFCKP9.54.90 to VEGF-A and on the binding of VEGF__CKP9.63.12 to VEGFA. The results of the experiment are shown against two different y axes.

[0079] FIG. 12 provides the results of experiments that were performed to determine the effects of VEGFCKP9.54.90 on CNV in rat eyes.

[0080] FIG. 13 provides the results of experiments that were performed to determine the IC5o values of VEGF-binding CKP variants.

[0081] FIG. 14 depicts the structures of VEGFCKP9.54 and VEGF_CKP9.63. Also shown in FIG. 14 is portion of the co-crystal structure of VEGF_CKP9.63 in complex with VEGF-A that shows that residue at position 8 within loop1 of VEGF_CKP9.63 could form a hydrogen bond with the side chain of Gln22 of VEGF-A.

[0082] FIG. 15 shows the results of phage competition ELISA experiments that were performed to assess the binding affinity of clones 9.54-28, 9.54, 9.54.1-2, 9.54.1-36, 9.54.1 42, 9.54.1-63, 9.54.1-90, and 9.54.1 for hVEGF(8-109).

[0083] FIG. 16A shows the results of phage competition ELISA experiments that were performed to assess the binding affinity of clones 9.63.44-1 to 9.63.44-7.

[0084] FIG. 16B shows the results of phage competition ELISA experiments that were performed to assess the binding affinity of clones 9.63.44-8 to 9.63.44-14.

DETAILED DESCRIPTION OF THE INVENTION

[00851 Provided are non-naturally occurring cystine knot peptides (CKPs) that specifically bind human VEGF-A. Such non-naturally occurring CKPs demonstrate one or more of the following characteristics: inhibition of VEGF-A activity with and ICo between less than about 0.5 nM and less than about 1.0 nM; binding to human VEGF-A, mouse VEGF-A, and rat VEGF-A; resistance to trypsin digestion; a disulfide bond connectivity of C1-C4, C2-C3, and C5-C6; an alpha helix content of at least about at least about 15% to least about 50%; binding to an epitope on VEGF-A that is different from the epitope bound by antibody G6.31, binding to an epitope on VEGF-A that is different from the epitope bound by bevacizumab, and/or binding to an epitope on VEGF-A that is different from the epitope bound by Flt-1.

[0086] Also provided are chimeric molecules and conjugates comprising non-naturally occurring cystine knot peptides that bind VEGF-A, nucleic acids encoding non-naturally occurring CKPs that bind VEGF-A, and compositions (such as pharmaceutical compositions). Also provided are methods of using non-naturally occurring CKPs that bind VEGF-A for treating ocular diseases and/or disorders (such as ocular vascular proliferative diseases and/or disorders) resulting from abnormal (such as excessive) angiogenesis and/or abnormal vascular permeability. Also provided are uses of non-naturally occurring CKPs that bind VEGF-A in the manufacture of a medicament for the treatment of ocular disease or disorders.

[00871 In a related aspect, non-naturally occurring CKPs that bind human low density lipoprotein receptor-related protein 6 (LRP6) are also provided.

[0088] Practice of the present disclosure employs, unless otherwise indicated, standard methods and conventional techniques in the fields of cell biology, toxicology, molecular biology, biochemistry, cell culture, immunology, oncology, recombinant DNA and related fields as are within the skill of the art. Such techniques are described in the literature and thereby available to those of skill in the art. See, for example, Alberts, B. et al., "Molecular Biology of the Cell," 5 th edition, Garland Science, New York, NY, 2008; Voet, D. et al. "Fundamentals of Biochemistry: Life at the Molecular Level," 3rd edition, John Wiley &

Sons, Hoboken, NJ, 2008; Sambrook, J. et al., "Molecular Cloning: A Laboratory Manual,"

3 rd edition, Cold Spring Harbor Laboratory Press, 2001; Ausubel, F. et al., "Current Protocols in Molecular Biology," John Wiley & Sons, New York, 1987 and periodic updates; Freshney, R.I., "Culture of Animal Cells: A Manual of Basic Technique," 4th edition, John

Wiley & Sons, Somerset, NJ, 2000; and the series "Methods in Enzymology," Academic Press, San Diego, CA.

Definitions

[0088a] In the claims which follow and in the description of the invention, except where the context requires otherwise due to express language or necessary implication, the word ''comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

[0089] As used herein "non-naturally occurring" means, e.g., a polypeptide comprising an amino acid sequence that is not found in nature, or, e.g., a nucleic acid comprising a nucleotide sequence that is not found in nature. A "non-naturally occurring cystine knot peptide" or "non-naturally occurring CKP" (or a nucleic acid encoding the same) provided herein does not have the amino acid sequence of a wild type EETI-II protein, i.e., GCPRILMRCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 1), wherein Loop 1 (LI) is the amino acid sequence PRILMR (SEQ ID NO: 92), Loop 2 (L2) is the amino acid sequence KQDSD (SEQ ID NO: 93), Loop 3 (L3) is the amino acid sequence LAG, Loop 4 (L4) is the amino acid V, and Loop 5 (L5) is the amino acid sequence GPNGF (SEQ ID NO: 15). A non-naturally occurring CKP provided herein can be produced by genetic engineering methods or by chemical synthesis methods. Thus, a non-naturally occurring CKP described herein may be recombinant, i.e., produced by a cell, or nucleic acid, or vector, that has been modified by the introduction of a heterologous nucleic acid or the alteration of a native nucleic acid to a form not native to that cell, or that the cell is derived from a cell so modified. Alternatively, a non-naturally occurring CKP described herein can be produced via chemical peptide synthesis.

[0090] As used herein, the term "cystine-knot peptide" or "CKP" refers to a peptide between 26-50 amino acids in length, which contain six conserved cysteine residues that form three disulfide bonds. One of the disulfides penetrates the macrocycle which is formed by the two other disulfides and their interconnecting backbones, thereby yielding a characteristic knotted topology with multiple loops exposed on the surface. The loops are defined as the amino acid regions which flank the six conserved cysteine residues and are highly variable in nature.

[0091] As used herein, an "amino acid alteration" refers to the addition, deletion, or substitution of at least one amino acid in, e.g., a peptide sequence (such as in the WT EETI-II peptide sequence to generate a non-naturally occurring CKP, or in a non-naturally occurring CKP to generate another non-naturally occurring CKP).

[0092] An "isolated" non-naturally occurring CKP or composition is one which has been identified and separated and/or recovered from a component of its natural environment. Contaminant components of its natural environment are materials which would interfere with diagnostic or therapeutic uses for the non-naturally occurring CKP, and can include enzymes, hormones, and other proteinaceous or nonproteinaceous solutes. In preferred embodiments, the non-naturally occurring CKP or composition will be purified (1) to greater than 95% by weight of non-naturally occurring CKP as determined by the Lowry method, and most preferably more than 99% by weight, (2) to a degree sufficient to obtain at least 15 residues of N-terminal or internal amino acid sequence by use of a spinning cup sequenator, or (3) to homogeneity by SDS-PAGE under reducing or nonreducing conditions using Coomassie blue or, preferably, silver stain. Isolated non-naturally occurring CKP includes the CKP in situ within recombinant cells since at least one component of the CKP's natural environment will not be present. An isolated non-naturally occurring CKP will be prepared by at least one purification step.

[0093] "Percent (%) amino acid sequence identity" or "homology" with respect to the polypeptide sequences identified herein is defined as the percentage of amino acid residues in a candidate sequence that are identical with the amino acid residues in the polypeptide being compared, after aligning the sequences considering any conservative substitutions as part of the sequence identity. Alignment for purposes of determining percent amino acid sequence identity can be achieved in various ways that are within the skill in the art, for instance, using publicly available computer software such as BLAST, BLAST-2, ALIGN or Megalign (DNASTAR) software. Those skilled in the art can determine appropriate parameters for measuring alignment, including any algorithms needed to achieve maximal alignment over the full length of the sequences being compared. For purposes herein, however, % amino acid sequence identity values are generated using the sequence comparison computer program ALIGN-2. The ALIGN-2 sequence comparison computer program was authored by Genentech, Inc. and the source code has been filed with user documentation in the U.S. Copyright Office, Washington D.C., 20559, where it is registered under U.S. Copyright Registration No. TXU510087. The ALIGN-2 program is publicly available through Genentech, Inc., South San Francisco, California. The ALIGN-2 program should be compiled for use on a UNIX operating system, preferably digital UNIX V4.0D. All sequence comparison parameters are set by the ALIGN-2 program and do not vary.

[0094] As used herein the term "epitope" refers to a protein determinant capable of being specifically bound by a non-naturally occurring CKP provided herein. An epitope can comprise between about 3-10 amino acids in a spatial conformation, which is unique to the epitope. These amino acids can be linear within the protein (i.e., consecutive in the amino acid sequence) or they can be positioned in different parts of the protein (i.e., non consecutive in the amino acid sequence). Methods of determining the spatial conformation of amino acids within a protein, or at the interface of two proteins, are known in the art, and include, for example, x-ray crystallography and 2- dimensional nuclear magnetic resonance.

[00951 The terms "disulfide bonding pattern (DBP)," "disulfide bond connectivity," and "disulfide linkage pattern" refers to the linking pattern of the cysteines relative to the WT EETI-1I protein. The WT EETI-II protein comprises six conserved cysteine residues (numbered 1-6) that form three disulfide bonds with connectivities C1-C4, C2-C5, and C3 C6. The disulfide bonding pattern is topologically constant, meaning the disulfide bonds can only be changed by unlinking one or more disulfides such as using redox conditions.

[00961 A "subject," "patient," or an "individual" for purposes of treatment refers to any animal classified as a mammal, including humans, domestic and farm animals, and zoo, sports, or pet animals, such as dogs, horses, cats, cows, etc. Preferably, the mammal is human.

[0097] An "effective amount" of a non-naturally occurring CKP (or a composition comprising such a non-naturally occurring CKP) as disclosed herein is an amount sufficient to carry out a specifically stated purpose. An "effective amount" can be determined empirically and by known methods relating to the stated purpose.

[0098] The term "therapeutically effective amount" refers to an amount of a non naturally occurring CKP or composition as disclosed herein, effective to "treat" a disease or disorder in a mammal (such as a human patient). In the case of ocular disease or ocular disorder (such as an ocular vascular proliferative disease or ocular disorder characterized by excessive angiogenesis ), the therapeutically effective amount of a non-naturally occurring CKP that binds VEGF-A described herein (or a composition comprising such a non-naturally occurring VEGF-A-binding CKP) refers to the amount to reduce, stop or prevent at least one symptom of the ocular disease, such as a symptom or disorder of an ocular disease described in further detail elsewhere herein. For example, an effective amount would be considered as the amount sufficient to reduce or prevent a symptom of the ocular disease or ocular disorder

27 17800220_1 (GHMaters) P108077.AU.1

(such as an ocular vascular proliferative disease or ocular disorder characterized by excessive angiogenesis ), for example a complete or partial resolution and/or maintenance of the ocular disease as measured by optical coherence tomography (OCT) or an increase and/or maintenance in best corrected visual acuity (such as greater than 5 letters as assessed by EDTRS eye chart), or a reduction in the size of the neovascularization or neovascular permeability as assessed by fundus fluorescence angiography. An effective amount as used herein would also include an amount sufficient to prevent or delay the development of, e.g., macular edema, enhanced permeability (such as retinal vascular permeability), size of CNV lesion, and vision loss. An effective amount as used herein would also include an amount sufficient to prevent or delay the development of a symptom of the ocular disease, alter the course of a symptom disease (for example but not limited to, slow the progression of a symptom of the ocular disease), or reverse a symptom of the disease.

[0099] As used herein, "treatment" or "treating" is an approach for obtaining beneficial or desired results including clinical results. For purposes of this invention, beneficial or desired clinical results include, but are not limited to, one or more of the following: alleviating one or more symptoms resulting from the ocular disease, diminishing the extent of the ocular disease, stabilizing the ocular disease (e.g., preventing or delaying the worsening of the disease), preventing or delaying the spread of the disease (such as to surrounding ocular tissues), preventing or delaying the recurrence of the ocular disease, delay or slowing the progression of the ocular disease, ameliorating the disease state, providing a remission or resolution (partial or total) of the ocular disease, decreasing the dose of one or more other medications required to treat the ocular disease, delaying the progression of the ocular disease, increasing or improving the quality of life, and/or preventing or delaying vision loss. Also encompassed by "treatment" is a reduction of pathological consequence of an ocular disease (such as, for example, vision loss). The methods provided herein contemplate any one or more of these aspects of treatment.

[0100] A "disorder" is any condition that would benefit from treatment with a non naturally occurring CKP that binds VEGF-A described herein. Non-limiting examples of VEGF-A-related disorders to be treated herein include ocular diseases and disorders (such as ocular vascular proliferative diseases or ocular disorders characterized by excessive angiogenesis), as described elsewhere herein.

[0101] As used herein, by "pharmaceutically acceptable" or "pharmacologically compatible" is meant a material that is not biologically or otherwise undesirable, e.g., the material may be incorporated into a pharmaceutical composition administered to a patient

28 17800220_1 (GHMaters) P108077.AU.1 without causing any significant undesirable biological effects or interacting in a deleterious manner with any of the other components of the composition in which it is contained. Pharmaceutically acceptable carriers or excipients have preferably met the required standards of toxicological and manufacturing testing and/or are included on the Inactive Ingredient Guide prepared by the U.S. Food and Drug administration.

[0102] The term "detecting" is intended to include determining the presence or absence of a substance or quantifying the amount of a substance (such as a target ligand). The term thus refers to the use of the materials, compositions, and methods provided herein for qualitative and quantitative determinations. In general, the particular technique used for detection is not critical for practice of the invention.

[0103] For example, "detecting" according to the invention may include: observing the presence or absence of a target ligand (including, but not limited to, a human low density lipoprotein receptor-related protein 6 (LRP6) polypeptide or a human vascular endothelial growth factor A (VEGF-A) polypeptide); a change in the levels of a target ligand; and/or a change in biological function/activity of a target ligand. In certain embodiments, "detecting" may include detecting levels of a target ligand (e.g., polypeptide levels of a human LRP6 or a human VEGF-A). Detecting may include quantifying a change (increase or decrease) of any value between 10% and 90%, or of any value between 30% and 60%, or over 100%, when compared to a control. Detecting may include quantifying a change of any value between 2 fold to 10-fold, inclusive, or more e.g., 100-fold.

[0104] The word "label" when used herein refers to a detectable compound or composition which is conjugated directly or indirectly to the non-naturally occurring CKP. The label may itself be detectable by itself (e.g., radioisotope labels or fluorescent labels) or, in the case of an enzymatic label, may catalyze chemical alteration of a substrate compound or composition which is detectable.

[0105] With regard to the binding of a non-naturally occurring CKP to a target ligand, the term "specific binding" or "specifically binds to" or is "specific for" a particular target ligand means that binding that is measurably different from a non-specific interaction. Specific binding can be measured, for example, by determining binding of a molecule compared to binding of a control molecule, which generally is a molecule of similar structure that does not have binding activity. For example, specific binding can be determined by competition with a control molecule that is similar to the target, for example, an excess of non-labeled target. In this case, specific binding is indicated if the binding of the labeled target to a probe is competitively inhibited by excess unlabeled target. In certain embodiments, the extent of binding of the non-naturally occurring CKP to a "non-target" ligand will be less than about 10% of the binding of the non-naturally occurring CKP to its target ligand (such as LRP6 or VEGF-A) as determined by, e.g., fluorescence activated cell sorting (FACS) analysis or radioimmunoprecipitation (RIA). In certain embodiments, a non naturally occurring CKP of the present disclosure specifically binds to a target ligand (such as human low density lipoprotein receptor-related protein 6 (LRP6) or human vascular endothelial growth factor A (VEGF-A)) with a dissociation constant (Kd) equal to or lower than 100 nM, optionally lower than 10 nM, optionally lower than 1 nM, optionally lower than 0.5 nM, optionally lower than 0.1 nM, optionally lower than 0.01 nM, or optionally lower than 0.005 nM; measured at a temperature of about 4 °C, 25 °C, 37 °C, or 45 °C.

[0106] Reference to "about" a value or parameter herein refers to the usual error range for the respective value readily known to the skilled person in this technical field. Reference to "about" a value or parameter herein includes (and describes) aspects that are directed to that value or parameter per se. For example, description referring to "about X" includes description of "X."

[01071 It is understood that aspects and embodiments of the invention described herein include "comprising,' ''consisting," and "consisting essentially of' aspects and embodiments.

[0108] All references cited herein, including patent applications and publications, are hereby incorporated by reference in their entirety.

Non-Naturally Occurring Cystine Knot Peptides (CKPs) That Bind Human Vascular Endothelial Growth Factor A (VEGF-A)

[0109] In certain embodiments, provided herein is a non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A), wherein the CKP comprises the following cystine scaffold structure (i.e., scaffold structure I):

ZiC1L1C2L2C3L3C4L4C5L5C6Z2 (I)

wherein:

Zi and Z2 are any amino acid;

of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure: XiX2X3X4X, wherein each of Xi - X5 is any amino acid or an unnatural amino acid selected from the group consisting of L propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, , t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. L3 is Loop 3 and has the structure: XiX 2X 3 wherein each of Xi - X3 is any amino acid or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, , t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine,

L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3 fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl) L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4 difluoro-L-phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl L-phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L alanine, 3-(5-aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4' biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl) L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine,

, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4 (naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide; L5 is Loop 5 and has the structure: XiX 2X 3 X 4 X, wherein each of Xi - X5 is any amino acid or an unnatural amino acid selected from the group consisting of L propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl

L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide; and wherein the CKP binds to VEGF-A with an affinity of 500 pM or less.

[0110] In certain embodiments, the C-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, the N-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, both the C- and N termini of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A are modified (such as capped). In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated. In certain embodiments, the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated. In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated and the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated.

[0111] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A has an altered disulfide bond connectivity-with reference to a wild type Ecballium elaterium trypsin inhibitor EETI-II protein having the amino acid sequence set forth in SEQ ID NO: 1; wherein the altered disulfide bond connectivity is C1-C4, C2-C3 and C5-C6.

[0112] In certain embodiments, Zi and/or Z 2 of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is G. In certain embodiments, Zi and/or Z 2 comprise more than one amino acid. In certain embodiments, Zi and/or Z 2 comprise 4 amino acids. In certain embodiments, Zi and/or Z 2 comprise 5 amino acids. In certain embodiments, Zi and/or Z 2 is an unnatural amino acid. In certain embodiments, the unnatural amino acid is N acetylglycine or glycine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an Li wherein X 3 is not I; wherein X5 is not M; and/or wherein X6 is not R. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an Li wherein Xi is an amino acid selected from P, Q, R, T, V, D, N, K, L, and X; wherein X 2 is an amino acid selected from T, D, L, V, I, R, P, N and X; wherein X3 is an amino acid selected from T, P, M, L, S, F, R, and X; wherein X 4 is an amino acid selected from R, T, Q, D, W, L, E, S, K, and X; wherein X5 is an amino acid selected from F, P, V, E, K, L, I, and X; wherein X6 is an amino acid selected from K, N, F, P, L, Y, T, D, M, and X; wherein X7 is an amino acid selected from Q, W, H and/X; and/or wherein X 8 is an amino acid selected from Y, A, G, D, E, W, S, and X, wherein X is and unnatural amino acid is selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an Li wherein X9 is an amino acid selected from L, I, V, D, E and X, wherein X is and unnatural amino acid is selected from the group consisting of L-propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine,

3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an LI wherein Xio is an amino acid selected from Y, T, M, N, F, and X, wherein X is and unnatural amino acid is selected from the group consisting of L-propargylglycine PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

[0113] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein each of Xi - X5 is any amino acid or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide; with the exception that X2 is not proline (P).

[0114] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein each of Xi - X5 is any amino acid or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine,

L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide, with the exception that X4 is not glycine (G). In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein Xi is an amino acid selected from G, Q, H, R, L, and Q; wherein X2 is an amino acid selected from P, M, W, Y, F, L, and H; wherein X3 is an amino acid selected from N, F, H, and Y; wherein X4 is an amino acid selected from G, Q, D, N, K, H, E, and S; and/or wherein X5 is an amino acid selected from F, S, and T. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L2 wherein Xi is K, X 2 is Q, X3 is D, X4 is S, and X5 is D. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L3wherein Xi is L, X 2 is A, and X 3 is G. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L4 wherein Xi is V or F.

[0115] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L comprising the structure XiX2X3X4XX6X7X8, wherein: Xi is an amino acid selected from P, Q, and R; X 2 is an amino acid selected from T, L, and D; X 3 is an amino acid selected from T, M and L; X4 is an amino acid selected from R, Q, and D; X5 is an amino acid selected from F, P, and V; X6 is an amino acid selected from K and F; X7 is an amino acid selected from Q and W; and X8 is an amino acid selected from Y, G, and D. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L comprising the structure XX2X3X4XX6X7X X9 Xio, wherein Xi is an amino acid selected from Q, R, T and V; X 2 is an amino acid selected from T and D; X3 is P; X 4 is an amino acid selected from T and W; X5 is an amino acid selected from F, E, P, and K; X6 is an amino acid selected from N and P; X 7 is an amino acid selected from W and H; X8 is an amino acid selected from A, D, E, and W; X9 is an amino acid selected from L and I; and Xio is an amino acid selected from Y, T, M and N. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein Xi is an amino acid selected from G, H, and Q; X2 is an amino acid selected from P, M, W, and Y; X3 is an amino acid selected from N and Y; X 4 is an amino acid selected from G, Q, and S; and X5 is an amino acid selected from F and S. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L2 wherein Xi is K, X2 is Q, X 3 is D, X 4 is S, and X 5 is D. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L3 wherein Xi is L, X2 is A, and X3 is G. In certain embodiments, the non naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L4 wherein Xi is V or F.

[0116] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L having the structure XX2X3X4XX6X7X, wherein: Xi is an amino acid selected from D, Q, N, and K; X2 is an amino acid selected from V, I, R, L, and P; X3 is an amino acid selected from L, S, M, T, and F; X4 is an amino acid selected from Q, L, and E; X5 is P; X6 is an amino acid selected from F, L, and Y; X 7 is W; and X8 is G. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein X 3 is Y; X 5 is S; and wherein Xi, X 2 and X 4 are each any amino acid, with the exception that Xi is not G, X 2 is not P, X 4 is not G, and/or X5 is not F. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein Xi is an amino acid selected from H, L, R, and Q; X 2 is an amino acid selected from W, F, and Y; X 3 is Y; X 4 is an amino acid selected from Q, N, K, H, and E; and X5 is S. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L2 wherein Xi is K, X2 is Q, X3 is D, X 4 is S, and X5 is D. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L3 wherein Xi is L, X 2 is A, and X3 is G. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L4 wherein Xi is V or F.

[0117] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L comprising the structure XX2X3X4XX6X7X X9 Xio, wherein Xi is an amino acid selected from K, Q, L, and R; X 2 is an amino acid selected from N and D; X 3 is an amino acid selected from P and L; X4 is an amino acid selected from L, T, S and K; X5 is an amino acid selected from F, V, I, and L; X6 is an amino acid selected from N and D; X 7 is W; X8 is an amino acid selected from A and S; X is an amino acid selected from L, V, E and D; and Xio is an amino acid selected from Y and F. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein Xi is Q; X2 is an amino acid selected from L, F, M, and H; X3 is an amino acid selected from F, Y, and H; X4 is an amino acid selected from D, Q, N, and K; and X5 is an amino acid selected from S and T. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L2 wherein Xi is K, X2 is Q, X3 is D, X4 is S, and X5 is D. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L3 wherein Xi is

L, X 2 is A, andX 3 is G. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L4 wherein Xi is V or F.

[0118] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L comprising the structureXiX2X3X4XX6X7X8, wherein:X5 is P; X7 is W; X8 is G; and wherein Xi,X2, X3, X 4 andX6 are each any amino acid, with the exception that Xi is not P,X2 is not R,X3 is not I, and/orX6 is not R. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L comprising the structureXiX 2 X 3 X4 XX 6 X 7 X 8 , wherein Xi is an

amino acid selected from N and D;X 2 is an amino acid selected from I and V;X3 is an amino acid selected from M and L;X 4 is an amino acid selected from L, Q, D and K;X5 is P; X6 is an amino acid selected from F, Y, T, L, and M;X 7 is W; and X8 is G. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein Xi is an amino acid selected from Q, H, L, and R;X 2 is an amino acid selected from Y and W;X 3 is Y; X 4 is an amino acid selected from Q and N; andX5 is S. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 whereinX3 is Y; X5 is S; and wherein Xi,X 2,andX 4 are each any amino acid, with the exception that Xi is not G,X 2 is not P, and/orX4 is not G. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L2 wherein Xi is an amino acid selected from G or E;X 2 is an amino acid selected from Q, L, P, R, E, and M;X3 is an amino acid selected from S, D, and N;X4 is an amino acid selected from F, Y, L, M, and I; and/orX5 is an amino acid selected from E, D, Q, L, and S. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L3 wherein Xi is L,X2 is A, andX3 is G. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L4 wherein Xi is V or F.

[0119] In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5, wherein each of Xi- X5 is any amino acid with the exception thatX2is not proline (P). In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5, wherein each of Xi- Xs is any amino acid with the exception thatX4is not glycine (G). In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5, wherein Xi is any amino acid except G;X2 is any amino acid except P;X3 is any amino acid except N;X4 is any amino acid except G; and/orX5 is any amino acid except F.

[01201 In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L comprising the structure XX2X3X4XX6X7X8, wherein Xi is an amino acid selected from N, D, and X; X 2 is an amino acid selected from I, V, and X; X 3 is M or X; X 4 is an amino acid selected from L, Q, and X; X5 is P or X; X6 is F, Y, or X; X7 is W or X; and X8 is G or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1 naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4 fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5 aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4' biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl) L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L3 wherein each of Xi - X 3 is any amino acid or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide, with the exception that Xi is not Leucine (L), X2 is not Alanine (A), and X 3 is not glycine (G), wherein the unnatural amino acid selected from the group consisting of L-propargylglycine PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L3 wherein Xi is an amino acid selected from M, F, L V, and X; X 2 is an amino acid selected from S, N, Q, I, Y, E, V, T, and X; and X3 is an amino acid selected from D, Q, T, N, E, R, and X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline,

4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L4 wherein Xi is any amino acid except V, or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1 naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4 fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5 aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4' biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl) L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide

(CKP) that binds to VEGF-A comprises an L4 wherein Xi is I, L, or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein X3 is Y or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para) L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine,

3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide; X 5 is S or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide; and wherein Xi, X2, and X4 are each any amino acid or an unnatural amino acid selected from the group

consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para) L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl

L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide, with the exception that Xi is not G, X2 is not P, and/or X4 is not G. In certain embodiments, the non naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5, wherein each of Xi - X5 is any amino acid with the exception that X 2 is not proline (P). In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein each of Xi - X 5 is any amino acid with the exception that X 4 is not glycine (G). In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L5 wherein Xi is an amino acid selected from Q, H, and X; X2 is an amino acid selected from Y, W, and X; X 3 is Y or X; X4 is an amino acid selected from Q, N, or X; X 5 is S or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3 fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl) L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4 difluoro-L-phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl L-phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L alanine, 3-(5-aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4' biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl) L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide. In certain embodiments, the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A comprises an L2 wherein Xi is G or X; X 2 is R, P, or X; X 3 is D or X; X4 is F, I, or X; and X5 is E, D, or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1 naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4 fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5 aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4' biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl) L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

[0121] In certain embodiments, the C-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, the N-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, both the C- and N termini of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A are modified (such as capped). In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated. In certain embodiments, the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated. In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated and the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated.

[0122] Also provided herein is a non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A, wherein the CKP comprises the cystine scaffold structure provided below (i.e., scaffold structure I):

ZiC1L1C2L2C3L3C4L4C5L5C6Z2(I)

wherein: Zi and Z 2 are any amino acid;

Li is Loop 1 and has a structure selected from the group consisting of: XiX2X3X4X5X6X7X, XiX 2X 3 X 4 X 5X 6X 7 XX9 , and XiX 2 X 3 X4 X 5X 6X 7X 8X 9Xio, wherein each of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure: XiX2X3X4X, wherein each of Xi - X5 is any amino acid; L3 is Loop 3 and has the structure: XiX2 X 3 wherein each of Xi - X3 is any amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid; L5 is Loop 5 and has the structure: XiX2 X 3X 4 X, wherein each of Xi - X5 is any amino acid; wherein, the CKP has an altered disulfide bond connectivity with reference to a wild-type Ecballium elaterium trypsin inhibitor EETI-II protein having the amino acid sequence set forth in SEQ ID NO: 1; wherein the altered disulfide bond connectivity is C1-C4, C2-C3 and C5-C6; and wherein the CKP has a percent alpha helix content of at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, or at least about 50%, including any range in between these values.

[01231 In certain embodiments, the non-naturally occurring CKP binds to VEGF-A with an affinity of about 500 pM or less.

[0124] In certain embodiments, the binding affinity of the non-naturally occurring CKP to VEGF-A is determined via, e.g., surface plasmon resonance or other assays detailed in the Examples below.

[0125] In certain embodiments, Zi and/or Z 2 of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is G. In certain embodiments, Zi and/or Z 2 comprise more than one amino acid. In certain embodiments, Zi and/or Z 2 comprise 4 amino acids. In certain embodiments, Zi and/or Z2 comprise 5 amino acids. In certain embodiments, Zi and/or Z 2 is an unnatural amino acid. In certain embodiments, the unnatural amino acid is N acetylglycine or glycine amide.

[0126] In certain embodiments, the C-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, the N-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, both the C- and N termini of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A are modified (such as capped). In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated. In certain embodiments, the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated. In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated and the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated.

[0127] In certain embodiments, the non-naturally occurring CKP that binds VEGF-A comprises an L5 wherein each of Xi - X5 is any amino acid with the exception that X2is not proline (P). In certain embodiments, the non-naturally occurring CKP that binds VEGF-A comprises an L5, each of Xi - X5 is any amino acid with the exception that X4 is not glycine (G). In certain embodiments, the non-naturally occurring CKP that binds VEGF-A inhibits VEGF-A activity with and IC5oof about 0.5 nM to about 1.0 nM. In certain embodiments, the degree of inhibition is determined via a cellular IC5o assay, as described in further detail in the Examples below.

[01281 In certain embodiments, the non-naturally occurring CKP that binds VEGF-A comprises an L1 comprising the amino acid sequence HMMYDY (SEQ ID NO: 231) or K/P/Q/R-K/T/L/D-W/T/M/L-Q/R/D-W/F/P/V-W/K/F-Y/Q/W-M/Y/G/D (SEQ ID NO: 115) or E/G/P/Q/R/T/V-T/E/A/D-D/T/I/P-W/V/Q/T/W-Y/F/N/E/P/K-P/E/W/N/P-H/Q/K/W/H Q/F/E/A/D/W-I/L/H-D/W/P/Y/T/M/N (SEQ ID NO: 232), with reference to scaffold structure I above. In certain embodiments, the non-naturally occurring CKP that binds VEGF-A further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments, the non-naturally occurring CKP that binds VEGF-A further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments, the non-naturally occurring CKP that binds VEGF-A comprises an L4 comprising V or F. In certain embodiments, the non-naturally occurring CKP that binds VEGF-A comprises an L5 comprising the amino acid sequence G/E/Y/Q/H-P/M/W/Y-N/Y/W-G/D/T/Q/R/S-F/A/E/S (SEQ ID NO: 20) or SWWPSL (SEQ ID NO: 237).

[0129] In certain embodiments, the non-naturally occurring CKP that binds VEGF-A comprises an L1 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 8-14 and 225-230, with reference to scaffold structure I above. In certain embodiments, the non-naturally occurring CKP that binds VEGF-A further comprises an L2

48 17800220_1 (GHMattes) P108077.AU.1 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments, the non-naturally occurring CKP that binds VEGF-A further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments, the non-naturally occurring CKP that binds VEGF-A comprises an L4 comprising V or F. In certain embodiments, the non naturally occurring CKP that binds VEGF-A further comprises an L5 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs 15-18 and 233-238). The amino acid sequences of SEQ ID NOs 8-18, 225-230, and 233-238 are provided in Table 1 below.

Table 1

ETDWYPHQID (SEQ ID NO: 225) GPNGF (SEQ ID NO: 233)

GETVFEQFLW (SEQ ID NO: 226) GPNGF (SEQ ID NO: 234)

HMMYDY (SEQ ID NO: 227) EMYDA (SEQ ID NO: 235)

KKWQWWYM (SEQ ID NO: 228) YPWTE (SEQ ID NO: 236)

PAIQNWKEHP (SEQ ID NO: 229) SWWPSL (SEQ ID NO: 237)

PTTRFKQY (SEQ ID NO: 8) GPNGF (SEQ ID NO: 15)

QDPTFNWALY (SEQ ID NO: 9) QMYQS (SEQ ID NO: 16)

QLMHPFWG (SEQ ID NO: 230) HWYRS (SEQ ID NO: 238)

QLMQPFWG (SEQ ID NO: 10) HWYQS (SEQ ID NO: 17)

RDLDVKWD (SEQ ID NO: 11) QYYSS (SEQ ID NO: 18)

RTPWEPHDIT (SEQ ID NO: 12) GPNGF (SEQ ID NO: 19)

TTPWPPHEIM (SEQ ID NO: 13)

VTPWKPHWIN (SEQ ID NO: 14)

[0130] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence on any one of SEQ ID NOs: 21-17 and 239-244. The amino acid sequences of SEQ ID NOs: 21-17 and 239-244 are provided in Table 2 below.

Table 2

GCETDWYPHQIDCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 239)

GCGETVFEQFLWCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 240)

GCHMMYDYCKQDSDCLAGCVCEMYDACG (SEQ ID NO: 241)

GCKKWQWWYMCKQDSDCLAGCVCYPWTECG (SEQ ID NO: 242)

GCPAIQNWKEHPCKQDSDCLAGCVCSWWPSLCG (SEQ ID NO: 243)

GCPTTRFKQYCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 21)

GCQDPTFNWALYCKQDSDCLAGCVCQMYQSCG (SEQ ID NO: 22)

GCQLMHPFWGCKQDSDCLAGCVCHWYRSCG (SEQ ID NO: 244)

GCQLMQPFWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 23)

GCRDLDVKWDCKQDSDCLAGCFCQYYSSCG (SEQ ID NO: 24)

GCRTPWEPHDITCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 25)

GCTTPWPPHEIMCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 26)

GCVTPWKPHWINCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 27)

[01311 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence Q/H/E/N/D-L/V/R/P/I-M/F/L Q/E/R/L-P-F/A/L/S-W-G (SEQ ID NO: 358), with reference to scaffold structure I above. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. IN certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence HWYQS (SEQ ID NO: 17).

[0132] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising an amino acid sequence selected from the group consisting of SEQ ID NOs 33, 36, and 245-253, with reference to scaffold structure I. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence HWYQS (SEQ ID NO: 17). The amino acid sequences of SEQ ID NOs 33, 36, and 245-253 are provided in Table 3 below:

Table 3

HLFEPLWG (SEQ ID NO: 245)

QVMRPFWG (SEQ ID NO: 246)

QVMQPAWG (SEQ ID NO: 247)

HRLQPLWG (SEQ ID NO: 248)

ELLQPSWG (SEQ ID NO: 249)

NPMLPFWG (SEQ ID NO: 368)

NVLLPLWG (SEQ ID NO: 250)

DIMQPLWG (SEQ ID NO: 36)

DLMQPLWG (SEQ ID NO: 251)

NPMLPLWG (SEQ ID NO: 252)

QVLQPSWG (SEQ ID NO: 253)

[01331 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence on any one of SEQ ID NOs: 265-275. The amino acid sequences of SEQ ID NOs: 265-275 are provided in Table 4 below.

Table 4

GCHLFEPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 265)

GCQVMRPFWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 266)

GCQVMQPAWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 267)

GCHRLQPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 268)

GCELLQPSWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 269)

GCNPMLPFWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 270)

GCNVLLPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 271)

GCDIMQPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 272)

GCDLMQPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 273)

GCNPMLPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 58)

GCQVLQPSWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 275)

[0134] In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an Li comprising the amino acid sequence QLMQPFWG (SEQ ID NO: ), with reference to scaffold structure I. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an L5 comprising the amino acid sequence R/H-W-Y N/Q/H-S (SEQ ID NO: 359).

[01351 In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an Li comprising the amino acid sequence QLMQPFWG (SEQ ID NO: ), with reference to scaffold structure I above. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an L5 comprising an amino acid sequence selected from the group consisting of HWYQS (SEQ ID NO: 17), RWYHS (SEQ ID NO: 43), and RWYNS (SEQ ID NO: 133).

[0136] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 23, 276, and 278. SEQ ID NOs 23, 276, and 278 are provided in Table 5 below.

Table 5

GCQLMQPFWGCKQDSDCLAGCVCRWYNSCG (SEQ ID NO: 276)

GCQLMQPFWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 23)

GCQLMQPFWGCKQDSDCLAGCVCRWYHSCG (SEQ ID NO: 278)

[01371 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an L comprising the amino acid sequence Q/D/K/N/A/R/H-L/V/I/R/P/V/ M/L/S/T/F-Q/E/L/H-P-F/L/M/Y/S-W-G (SEQ ID NO: 40), with reference to scaffold structure I. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence H/L/R/Q/-W/F/Y-Y-Q/N/K/H/D/E-S (SEQ ID NO: 360).

[0138] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an L Icomprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 28-39 and 254-261, with reference to scaffold structure I. In certain

52 17800220_1 (GHMattes) P108077.AU.1 embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 17, 41-46, 133, 262-264, and 567. The amino acid sequences of SEQ ID NOs: 17, 28-39, 41-46, 133, 254 264, and 567 are provided in Table 6 below:

Table 6

DVLQPFWG (SEQ ID NO: 28) HWYQS (SEQ ID NO: 17)

QISQPFWG (SEQ ID NO: 29) HFYNS (SEQ ID NO: 41)

DRMQPLWG (SEQ ID NO: 30) LWYKS (SEQ ID NO: 42)

QLLEPMWG (SEQ ID NO: 254) HWYNS (SEQ ID NO: 46)

KLLQPMWG (SEQ ID NO: 255) QWYKS (SEQ ID NO: 262)

DRMQPYWG (SEQ ID NO: 256) RWYHS (SEQ ID NO: 43)

NLMLPFWG (SEQ ID NO: 31) RWYQS (SEQ ID NO: 44)

QRTQPFWG (SEQ ID NO: 32) LWYDS (SEQ ID NO: 263)

KIMQPLWG (SEQ ID NO: 257) QYYQS (SEQ ID NO: 45)

NLMHPFWG (SEQ ID NO: 258) RWYNS (SEQ ID NO: 133)

NIMLPFWG (SEQ ID NO: 33) QWYQS (SEQ ID NO: 264)

DPMQPFWG (SEQ ID NO: 34) NPMLPLWG (SEQ ID NO: 38)

DVMQPYWG (SEQ ID NO: 35) KLFEPLWG (SEQ ID NO: 39)

DIMQPLWG (SEQ ID NO: 36) RWYES (SEQ ID NO: 567)

ALLQPLWG (SEQ ID NO: 259)

QLLQPLWG (SEQ ID NO: 37)

RLLEPSWG (SEQ ID NO: 260)

HLLLPLWG (SEQ ID NO: 261)

[0139] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 47-59 and 279-286. The amino acid sequences of SEQ ID NOs: 47-59 and 279-286 are provided in Table 7 below.

Table 7

GCDVLQPFWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 47)

GCQISQPFWGCKQDSDCLAGCVCHFYNSCG (SEQ ID NO: 48)

GCDRMQPLWGCKQDSDCLAGCVCLWYKSCG (SEQ ID NO: 49)

GCQLLEPMWGCKQDSDCLAGCVCHWYNSCG (SEQ ID NO: 279)

GCKLLQPMWGCKQDSDCLAGCVCRWYQSCG (SEQ ID NO: 280)

GCDRMQPYWGCKQDSDCLAGCVCQWYKSCG (SEQ ID NO: 281)

GCNLMLPFWGCKQDSDCLAGCVCRWYHSCG (SEQ ID NO: 50)

GCQRTQPFWGCKQDSDCLAGCVCRWYQSCG (SEQ ID NO: 51)

GCKIMQPLWGCKQDSDCLAGCVCLWYDSCG (SEQ ID NO: 282)

GCNLMHPFWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 283)

GCNIMLPFWGCKQDSDCLAGCVCQYYQSCG (SEQ ID NO: 52)

GCNPMLPFWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 53)

GCDPMQPFWGCKQDSDCLAGCVCRWYQSCG (SEQ ID NO: 54)

GCDVMQPYWGCKQDSDCLAGCVCHWYNSCG (SEQ ID NO: 55)

GCDIMQPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 56)

GCALLQPLWGCKQDSDCLAGCVCRWYNSCG (SEQ ID NO: 284)

GCQLLQPLWGCKQDSDCLAGCVCRWYQSCG (SEQ ID NO: 57)

GCRLLEPSWGCKQDSDCLAGCVCQWYQSCG (SEQ ID NO: 285)

GCHLLLPLWGCKQDSDCLAGCVCRWYHSCG (SEQ ID NO: 286)

GCNPMLPLWGCKQDSDCLAGCVCHWYQSCG (SEQ ID NO: 58)

GCKLFEPLWGCKQDSDCLAGCVCRWYESCG (SEQ ID NO: 59)

[0140] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence Q/D/K/W/E/L/R-D/N-P/R/L/T T/S/L/K-F/V/L/I-N/D-W-A/S/G-L/V/E/T/Q/D-F/Y(SEQ ID NO: 70), with reference to scaffold structure I. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence Q/R-M/L/F/H-Y/F/H-D/Q/N/K-S/T (SEQ ID NO: 80).

[0141] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an Li comprising an amino acid sequence selected from the group consisting of

SEQ ID NOs: 60-69 and 287-291. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 16, 71-79, 274, and 292. The amino acid sequences of SEQ ID NOs: 16, 60-69, 71-79, 274, and 287-292 are provided in Table 8 below.

Table 8

DDPSFDWSVY (SEQ ID NO: 287) RMYDS (SEQ ID NO: 292)

KNPLFNWALY (SEQ ID NO: 60) QLFDS (SEQ ID NO: 71)

QDPTVNWAVY (SEQ ID NO: 61) QFYQS (SEQ ID NO: 72)

QDPTFNWAEY (SEQ ID NO: 62) QLYQS (SEQ ID NO: 73)

WDPTFNWALY (SEQ ID NO: 288) QMYDS (SEQ ID NO: 76)

QDPTLNWATY (SEQ ID NO: 289) QMYQS (SEQ ID NO: 16)

EDPTVDWAQY (SEQ ID NO: 290) QMHQS (SEQ ID NO: 74)

QDPSLNWADY (SEQ ID NO: 63) QMYNS (SEQ ID NO: 75)

LDRTLNWALY (SEQ ID NO: 64) QLYQS (SEQ ID NO: 73)

LDPSFNWSLY (SEQ ID NO: 65) QHYKT (SEQ ID NO: 77)

RDLTINWALF (SEQ ID NO: 66) QLFNS (SEQ ID NO: 78)

KDTTFNWGLF (SEQ ID NO: 291) QLYNS (SEQ ID NO: 79)

LDPTVNWALF (SEQ ID NO: 67) QMFNS (SEQ ID NO: 274)

QDPKLNWAVY (SEQ ID NO: 68)

LDPSFDWALY (SEQ ID NO: 69)

[0142] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 81-91 and 293-297. The amino acid sequences of SEQ ID NOs: 81-91 and 293-297 are provided in Table 9 below.

Table 9

GCDDPSFDWSVYCKQDSDCLAGCVCRMYDSCG (SEQ ID NO: 293)

GCKNPLFNWALYCKQDSDCLAGCVCQLFDSCG (SEQ ID NO: 81)

GCQDPTVNWAVYCKQDSDCLAGCVCQFYQSCG (SEQ ID NO: 82)

GCQDPTFNWAEYCKQDSDCLAGCVCQLYQSCG (SEQ ID NO: 83)

GCWDPTFNWALYCKQDSDCLAGCVCQMYDSCG (SEQ ID NO: 294)

GCQDPTFNWAEYCKQDSDCLAGCVCQMYQSCG (SEQ ID NO: 84)

GCQDPSLNWADYCKQDSDCLAGCVCQMHQSCG (SEQ ID NO: 85)

GCQDPTLNWATYCKQDSDCLAGCVCQMYQSCG (SEQ ID NO: 295)

GCEDPTVDWAQYCKQDSDCLAGCVCQMYQSCG (SEQ ID NO: 296)

GCLDRTLNWALYCKQDSDCLAGCVCQMYNSCG (SEQ ID NO: 86)

GCLDPSFNWSLYCKQDSDCLAGCVCQMYDSCG (SEQ ID NO: 87)

GCRDLTINWALFCKQDSDCLAGCVCQMFNSCG (SEQ ID NO: 88)

GCKDTTFNWGLFCKQDSDCLAGCVCQLYQSCG (SEQ ID NO: 297)

GCLDPTVNWALFCKQDSDCLAGCVCQHYKTCG (SEQ ID NO: 89)

GCQDPKLNWAVYCKQDSDCLAGCVCQLFNSCG (SEQ ID NO: 90)

GCLDPSFDWALYCKQDSDCLAGCVCQLYNSCG (SEQ ID NO: 91)

[0143] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF A binding CKP further comprises an L2 comprising the amino acid sequence K/G/Q/S/N Q/L/P/A/V/T/R/W/K/G/Y-D/S/E/N-S/F/Y/L/F/Q/M-D/E/N/A/L/F/H/Q (SEQ ID NO: 98). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45).

[0144] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an Li comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF A binding CKP further comprises an L2 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 94-97 and 298-309. In certain embodiments the non naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45). The amino acid sequences of SEQ ID NOs: 94-97 and 298-309 are provided in Table 10 below.

Table 10

GQSFE (SEQ ID NO: 94) GWDQF (SEQ ID NO: 304)

GLDYD (SEQ ID NO: 95) GKDFH (SEQ ID NO: 305)

GPELN (SEQ ID NO: 298) GPDLQ (SEQ ID NO: 96)

QADYA (SEQ ID NO: 299) SGDFA (SEQ ID NO: 306)

GVDYL (SEQ ID NO: 300) GKELN (SEQ ID NO: 307)

GTNFL (SEQ ID NO: 301) GWSMD (SEQ ID NO: 308)

SRDFD (SEQ ID NO: 302) GYDLQ (SEQ ID NO: 309)

NRDFL (SEQ ID NO: 303) GRDFE (SEQ ID NO: 97)

[0145] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 99 102 and 310-321. The amino acid sequences of SEQ ID NOs: 99-102 and 310-321 are provided in Table 11 below.

Table 11

GCNIMLPFWGCGQSFECLAGCVCQYYQSCG (SEQ ID NO: 99)

GCNIMLPFWGCGLDYDCLAGCVCQYYQSCG (SEQ ID NO: 100)

GCNIMLPFWGCGPELNCLAGCVCQYYQSCG (SEQ ID NO: 310)

GCNIMLPFWGCQADYACLAGCVCQYYQSCG (SEQ ID NO: 311)

GCNIMLPFWGCGVDYLCLAGCVCQYYQSCG (SEQ ID NO: 312)

GCNIMLPFWGCGTNFLCLAGCVCQYYQSCG (SEQ ID NO: 313)

GCNIMLPFWGCSRDFDCLAGCVCQYYQSCG (SEQ ID NO: 314)

GCNIMLPFWGCNRDFLCLAGCVCQYYQSCG (SEQ ID NO: 315)

GCNIMLPFWGCGWDQFCLAGCVCQYYQSCG (SEQ ID NO: 316)

GCNIMLPFWGCGKDFHCLAGCVCQYYQSCG (SEQ ID NO: 317)

GCNIMLPFWGCGPDLQCLAGCVCQYYQSCG (SEQ ID NO: 101)

GCNIMLPFWGCSGDFACLAGCVCQYYQSCG (SEQ ID NO: 318)

GCNIMLPFWGCGKELNCLAGCVCQYYQSCG (SEQ ID NO: 319)

GCNIMLPFWGCGWSMDCLAGCVCQYYQSCG (SEQ ID NO: 320)

GCNIMLPFWGCGYDLQCLAGCVCQYYQSCG (SEQ ID NO: 321)

GCNIMLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 102)

[01461 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence N-I-M/L-L/S/T/Q/N/E/D-P-F/Y/S-WG (SEQ ID NO: 454), with reference to scaffold structure I. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises an Li comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence GRDFE (SEQ ID NO: 97). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence L/V/M/F-A/Q/E/S/N/Y/I/T-G/Q/R/D/T/N/E. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V or I. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence QYYQS (SEQ ID NO:

).

[0147] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence selected from the group consisting of NIMLPFWG (SEQ ID NO: 33), NILLPFWG (SEQ ID NO: 396), NILLPYWG (SEQ ID NO: 397), NIMSPFWG (SEQ ID NO: 398), NIMTPFWG (SEQ ID NO: 399), NIMQPFWG (SEQ ID NO: 400), NIMNPFWG (SEQ ID NO: 401), NIMEPFWG (SEQ ID NO: 402), NIMDPFWG (SEQ ID NO: 403), NIMLPSWG (SEQ ID NO: 414), and NIMLPYWG (SEQ ID NO: 141) with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an Li comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33), with reference to scaffold structure V or I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence GRDFE (SEQ ID NO: 97). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising an amino acid sequence selected from the group consisting of: LQQ, VER, MSD, MNQ, MQT, VYQ, FIN, VSQ, VTE, FYE, MEQ, and VYR. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid I. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45).

[0148] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence selected from the group consisting of SEQ ID NO: 103 114. The amino acid sequences of SEQ ID NOs: 103-114 are provided in Table 12 below.

Table 12

GCNIMLPFWGCGRDFECLQQCICQYYQSCG (SEQ ID NO: 103)

GCNIMLPFWGCGRDFECVERCICQYYQSCG (SEQ ID NO: 104)

GCNIMLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 105)

GCNIMLPFWGCGRDFECMNQCICQYYQSCG (SEQ ID NO: 106)

GCNIMLPFWGCGRDFECMQTCICQYYQSCG (SEQ ID NO: 107)

GCNIMLPFWGCGRDFECVYQCICQYYQSCG (SEQ ID NO: 108)

GCNIMLPFWGCGRDFECFINCICQYYQSCG (SEQ ID NO: 109)

GCNIMLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 110)

GCNIMLPFWGCGRDFECVTECICQYYQSCG (SEQ ID NO: 111)

GCNIMLPFWGCGRDFECFYECICQYYQSCG (SEQ ID NO: 112)

GCNIMLPFWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 113)

GCNIMLPFWGCGRDFECVYRCICQYYQSCG (SEQ ID NO: 114)

GCDVLQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 386)

GCNILLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 405)

GCNILLPYWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 406)

GCNIMSPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 407)

GCNIMTPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 408)

GCNIMQPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 409)

GCNIMNPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 410)

GCNIMEPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 411)

GCNIMDPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 412)

GCNIMLPSWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 415)

GCNIMLPFWGCGRDFECLSGCVCQYYQSCG (SEQ ID NO: 421)

GCNIMLPFWGCGRDFECLTGCVCQYYQSCG (SEQ ID NO: 422)

GCNIMLPFWGCGRDFECLEGCVCQYYQSCG (SEQ ID NO: 423)

GCNIMLPYWGCGRDFECLAGCLCQYYQSCG (SEQ ID NO: 424)

GCNIMLPYWGCGRDFECLAGCICQYYQSCG (SEQ ID NO: 425)

GCNIMLPYWGCGRDFECLAGCVCQYYQSCS (SEQ ID NO: 431)

GCNILLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 435)

[01491 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF A binding CKP further comprises an L2 comprising the amino acid sequence K/G/D/A/E Q/E/R/V/P/D/M/G/N/L/A/F-D/N/Y/S-S/F/L/I/M/Y/V/N/E-D/L/Q/S/E/T/L/A/N (SEQ ID NO: 121). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46).

[0150] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF A binding CKP further comprises an L2 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 117-120, 211, and 322-339. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46). The amino acid sequences of SEQ ID NOs: 117-120, 211, and 322-339 are provided in Table 13 below.

Table 13

GENFL (SEQ ID NO: 117) DGDFD (SEQ ID NO: 331)

GRDLQ (SEQ ID NO: 322) AGDFE (SEQ ID NO: 332)

GVDLS (SEQ ID NO: 323) EMDFD (SEQ ID NO: 120)

GPDID (SEQ ID NO: 118) GNSFE (SEQ ID NO: 333)

GDDLE (SEQ ID NO: 324) GQDLT (SEQ ID NO: 334)

GVDMT (SEQ ID NO: 325) GENLA (SEQ ID NO: 335)

GMDIE (SEQ ID NO: 326) GQDYN (SEQ ID NO: 336)

DGDYQ (SEQ ID NO: 327) GADLS (SEQ ID NO: 337)

GNDVS (SEQ ID NO: 328) GFDMD (SEQ ID NO: 338)

GRDMD (SEQ ID NO: 119) GESLS (SEQ ID NO: 211)

AGDEL (SEQ ID NO: 329) DLNYE (SEQ ID NO: 339)

GLDEE (SEQ ID NO: 330)

[0151] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 122 126 and 340-357. The amino acid sequences of SEQ ID NOs: SEQ ID NOs: 122-126 and 340-357 are provided in Table 14 below.

Table 14

GCDVMQPYWGCGENFLCLAGCVCHWYNSCG (SEQ ID NO: 122)

GCDVMQPYWGCGRDLQCLAGCVCHWYNSCG (SEQ ID NO: 340)

GCDVMQPYWGCGVDLSCLAGCVCHWYNSCG (SEQ ID NO: 341)

GCDVMQPYWGCGPDIDCLAGCVCHWYNSCG (SEQ ID NO: 123)

GCDVMQPYWGCGDDLECLAGCVCHWYNSCG (SEQ ID NO: 342)

GCDVMQPYWGCGVDMTCLAGCVCHWYNSCG (SEQ ID NO: 343)

GCDVMQPYWGCGMDIECLAGCVCHWYNSCG (SEQ ID NO: 344)

GCDVMQPYWGCDGDYQCLAGCVCHWYNSCG (SEQ ID NO: 345)

GCDVMQPYWGCGNDVSCLAGCVCHWYNSCG (SEQ ID NO: 346)

GCDVMQPYWGCGRDMDCLAGCVCHWYNSCG (SEQ ID NO: 124)

GCDVMQPYWGCAGDELCLAGCVCHWYNSCG (SEQ ID NO: 347)

GCDVMQPYWGCGLDEECLAGCVCHWYNSCG (SEQ ID NO: 348)

GCDVMQPYWGCDGDFDCLAGCVCHWYNSCG (SEQ ID NO: 349)

GCDVMQPYWGCAGDFECLAGCVCHWYNSCG (SEQ ID NO: 350)

GCDVMQPYWGCEMDFDCLAGCVCHWYNSCG (SEQ ID NO: 125)

GCDVMQPYWGCGNSFECLAGCVCHWYNSCG (SEQ ID NO: 351)

GCDVMQPYWGCGQDLTCLAGCVCHWYNSCG (SEQ ID NO: 352)

GCDVMQPYWGCGENLACLAGCVCHWYNSCG (SEQ ID NO: 353)

GCDVMQPYWGCGQDYNCLAGCVCHWYNSCG (SEQ ID NO: 354)

GCDVMQPYWGCGADLSCLAGCVCHWYNSCG (SEQ ID NO: 355)

GCDVMQPYWGCGFDMDCLAGCVCHWYNSCG (SEQ ID NO: 356)

GCDVMQPYWGCGESLSCLAGCVCHWYNSCG (SEQ ID NO: 126)

GCDVMQPYWGCDLNYECLAGCVCHWYNSCG (SEQ ID NO: 357)

[01521 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an L comprising the amino acid sequence D-V-M/L-Q/K/D-P-Y/M/T/L-W-G (SEQ ID NO: 130), with reference to scaffold structure I. In certain embodiments, the non naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence

[0153] KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence H/L/Q/R-W-Y-N-S (SEQ ID NO: 134).

[0154] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising an amino acid sequence selected from SEQ ID NOs: 127-129, with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence LAG. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 131-133. The amino acid sequences of SEQ ID NOs: 127 129 and 131-133 are provided in Table 15 below:

Table 15

DVMKPMWG (SEQ ID NO: 127) QWYNS (SEQ ID NO: 131)

DVLDPTWG (SEQ ID NO: 128) LWYNS (SEQ ID NO: 132)

DVLQPLWG (SEQ ID NO: 129) RWYNS (SEQ ID NO: 133)

[0155] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 135 137. The amino acid sequences of SEQ ID NOs: 135-127 are provided in Table 16 below:

Table 16

GCDVMKPMWGCKQDSDCLAGCVCQWYNSCG (SEQ ID NO: 135)

GCDVLDPTWGCKQDSDCLAGCVCLWYNSCG (SEQ ID NO: 136)

GCDVLQPLWGCKQDSDCLAGCVCRWYNSCG (SEQ ID NO: 137)

[0156] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF A binding CKP further comprises an L2 comprising the amino acid sequence GPDID (SEQ ID NO: 118). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising the amino acid sequence L/F-A/V/S-G/R/N. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising an amino acid selected from V, I, and L. In certain embodiments the non naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46).

[01571 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF

A binding CKP further comprises an L2 comprising the amino acid sequence GPDID (SEQ ID NO: 118). In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising an amino acid sequence FVR and LSN. In certain embodiments the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising an amino acid selected from V, I, and L. In certain embodiments the non naturally occurring VEGF-A binding CKP further comprises an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46).

[0158] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVMQPYWGCGPDIDCFVRCLCHWYNSCG (SEQ ID NO: 139). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVMQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 140).

[0159] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an LI, L2, L3, L4 and/or L5 of any one of the non-naturally occurring VEGF-A binding CKPs disclosed herein. Thus, in certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an Li comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 8-14, 28-39, 60-69, 127-129, 141, 225-230, 245-261, 287-291, 396-403, and 414 with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an L2 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 93-97, 117-120, 211, 298 309, and 322-339. In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an L3 comprising an amino acid sequence selected from the group consisting of LAG, LQQ, VER, MSD, MNQ, MQT, VYQ, FIN, VSQ, VTE, FYE, MEQ, and VYR, FVR and LSN. In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an L4 comprising the amino acid V, F, I, or L. In certain embodiments, the non-naturally occurring VEGF-A binding CKP further comprises an L5 comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 15 18, 41-46, 71-79, 131-133, 233-238, 262-264, and 292. In certain embodiments, the C terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, the N-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, both the C- and N- termini of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A are modified (such as capped). In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated. In certain embodiments, the N-terminal amine of the non naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated. In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated and the N-terminal amine of the non naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated.

[01601 In certain embodiments, at least one amino acid is deleted from a VEGF-A binding CKP provided herein. In certain embodiments, at least one amino acid is deleted from the N-terminus. In certain embodiments, at least one amino acid is deleted from the C terminus. In certain embodiments, at least one amino acid is deleted from the N-terminus and the C-terminus. In certain embodiments, at least one internal amino acid is deleted. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence CNIMLPYWGCGRDFECLAGCVCQYYQSC (SEQ ID NO: 217). In certain embodiments, the C-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, the N terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, both the C- and N- termini of the non naturally occurring cystine knot peptide (CKP) that binds to VEGF-A are modified (such as capped). In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated. In certain embodiments, the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated. In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated and the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated.

[01611 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises at least one amino acid addition. In certain embodiments, at least one amino acid is added to the N-terminus. In certain embodiments, at least one amino acid is added to the C-terminus. In certain embodiments, at least one amino acid is added to the N-terminus and the C-terminus.

[0162] In certain embodiments, two amino acids are added to the N-terminus of a non naturally occurring VEGF-A binding CKP provided herein. In certain embodiments, two amino acids are added to the N-terminus of the non-naturally occurring VEGF-A binding CKP set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 102). In certain embodiments, the two amino acids added to the N-terminus of SEQ ID NO: 102 are

F/I/G/T/V/L-H/A/S/R. In certain embodiments, the two amino acids added to the N-terminus of SEQ ID NO: 102 are selected from the group consisting of: FH, IA, GS, TR, VH, and LS. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGFH (SEQ ID NO: 379). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGIA (SEQ ID NO: 380). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGGS (SEQ ID NO: 381). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGTR (SEQ ID NO: 382). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGVH (SEQ ID NO: 383). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGLS (SEQ ID NO: 384).

[01631 In certain embodiments, two amino acids are added to the N-terminus of the non naturally occurring VEGF-A binding CKP set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 386). In certain embodiments, the two amino acids added to the N-terminus of SEQ ID NO: 102 are R/W/P/D/Q/E/S-T/K/E/F/Q/L/S. In certain embodiments, the two amino acids added to the N-terminus of SEQ ID NO: 102 are selected from the group consisting of: RT, WK, PL, DE, QF, EQ, PT, RL, and SL. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGRT (SEQ ID NO: 387). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGWK (SEQ ID NO: 388). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGPL (SEQ ID NO: 389). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGDE (SEQ ID NO: 390). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGQF (SEQ ID NO: 391). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGEQ (SEQ ID NO: 392). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGPT (SEQ ID NO: 393). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGRL (SEQ ID NO: 394). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCDVLQPYWGCGPDIDCLSNCICHWYNSCGSL (SEQ ID NO: 395).

[0164] In certain embodiments, three amino acids are added to the N-terminus of a non naturally occurring VEGF-A binding CKP provided herein. In certain embodiments, two amino acids are added to the N-terminus of the non-naturally occurring VEGF-A binding CKP set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 102). In certain embodiments, the three amino acids added to the N-terminus of SEQ ID NO: 102 are P/N/T/D/E/Y/W-L/Y/F/H/D/P-I/Q/V/K/S/Y/H. In certain embodiments, the three amino acids added to the N-terminus of SEQ ID NO: 102 are selected from the group consisting of: PLI, NYQ, PLQ, TFQ, DLV, EHK, YLS, WDY, WPH, and PHQ. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGPLI (SEQ ID NO: 369). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGNYQ (SEQ ID NO: 370). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGPLQ (SEQ ID NO: 371). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGTFQ (SEQ ID NO: 372). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGDLV (SEQ ID NO: 373). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGEHK (SEQ ID NO: 374). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in

GCNIMLPFWGCGRDFECLAGCVCQYYQSCGYLS (SEQ ID NO: 375). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGWDY (SEQ ID NO: 376). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGWPH (SEQ ID NO: 377). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an amino acid sequence set forth in GCNIMLPFWGCGRDFECLAGCVCQYYQSCGPHQ (SEQ ID NO: 378).

[01651 In certain embodiments, the C-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, the N-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, both the C- and N termini of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A are modified (such as capped). In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated. In certain embodiments, the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated. In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated and the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated.

[01661 In certain embodiments, the non-naturally occurring VEGF-A-binding CKP is a variant of a non-naturally occurring VEGF-A-binding CKP described herein. In certain embodiments, such a variant comprises at least 1, at least 2, at least 3, at least 4, at least 5, at least 6, at least 7, at least 8, at least 9, or at least 10 amino acid substitutions in one or more of the sequences set forth in SEQ ID NOs: 8-14, 28-39, 60-69, 127-129, 141, 225-230, 245-261, 287-291, 396-403, and 414; SEQ ID NOs: 93-97, 117-120, 211, 298-309, and 322-339; amino acid sequences LAG, LQQ, VER, MSD, MNQ, MQT, VYQ, FIN, VSQ, VTE, FYE, MEQ, and VYR, FVR and LSN; and/or 15-18, 41-46, 71-79, 131-133, 233-238, 262-264, and 292. In certain embodiments, the amino acid substitution(s) are conservative amino acid substitution(s). In certain embodiments, the amino acid substitutions do not substantially reduce the ability of the non-naturally occurring VEGF-A-binding CKP to bind human VEGF-A. For example, conservative alterations (e.g., conservative substitutions as provided herein) that do not substantially reduce VEGF-A binding affinity may be made. The binding affinity of a variant of a non-naturally occurring VEGF-A -binding CKP can be assessed using a method described in the Examples below.

[01671 Conservative substitutions are shown in Table 17 below under the heading of "conservative substitutions." More substantial changes are provided in Table 17 under the heading of "exemplary substitutions," and as further described below in reference to amino acid side chain classes. Amino acid substitutions may be introduced into a variant of a non naturally occurring VEGF-A-binding CKP and the products screened for a desired activity, e.g., retained/improved VEGF-A binding.

Table 17: Conservative Substitutions

Original Residue Exemplary Substitutions Preferred Substitutions Ala (A) Val; Leu; Ile Val Arg (R) Lys; Gln; Asn Lys

Asn (N) Gln; His; Asp, Lys; Arg Gln Asp (D) Glu; Asn Glu

Cys (C) Ser; Ala Ser

Gln (Q) Asn; Glu Asn Glu (E) Asp; Gln Asp Gly (G) Ala Ala His (H) Asn; Gln; Lys; Arg Arg

Ile (I) Leu; Val; Met; Ala; Phe; Leu Norleucine

Leu (L) Norleucine; Ile; Val; Met; Ile Ala; Phe Lys (K) Arg; Gln; Asn Arg Met (M) Leu; Phe; Ile Leu

Phe (F) Trp; Leu; Val; Ile; Ala; Tyr Tyr Pro (P) Ala Ala Ser (S) Thr Thr Thr (T) Val; Ser Ser

Trp (W) Tyr; Phe Tyr Tyr (Y) Trp; Phe; Thr; Ser Phe

Val (V) Ile; Leu; Met; Phe; Ala; Leu Norleucine

[0168] Non-conservative substitutions will entail exchanging a member of one of these classes for another class.

[01691 An exemplary substitutional variant is an affinity matured non-naturally occurring VEGF-A-binding CKP, which may be conveniently generated, e.g., using phage display based affinity maturation techniques such as those described herein. Briefly, one or more residues in LI, L2, L3, L4, and/or L5 is altered (i.e., added, deleted, or substituted) and the variant VEGF-A-binding CKP is displayed on phage and screened for VEGF-A binding affinity. In certain embodiments of affinity maturation, diversity is introduced into the variable genes chosen for maturation by any of a variety of methods (e.g., error-prone PCR, loop shuffling, or oligonucleotide-directed mutagenesis). A secondary library is then created. The library is then screened to identify any non-naturally occurring CKP variants with the desired affinity for VEGF-A. In certain embodiments, introducing diversity involves loop directed approaches, in which several residues in LI, L2, L3, L4, and/or L5 (e.g., about 5, about 4-6, or about 6-10 residues at a time) are randomized. LI, L2, L3, L4, and/or L5 residues involved in binding a target ligand may be identified, e.g., using alanine scanning mutagenesis or modeling.

[01701 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGQSFECLAGCVCQYYQSCG (SEQ ID NO: 215).

[01711 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 216).

[0172] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAKCVCQYYQSCG (SEQ ID NO: 542).

[0173] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 363).

[0174] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 364).

[0175] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECMNQCICQYYQSCG (SEQ ID NO: 222).

[01761 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECFYECICQYYQSCG (SEQ ID NO: 223).

[0177] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 142).

[0178] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNILLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 405).

[0179] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNILLPYWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 406).

[01801 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMSPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 407).

[01811 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMTPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 408).

[0182] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMQPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 409).

[01831 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMNPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 410).

[0184] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMEPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 411).

[01851 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMDPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 412).

[01861 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPSWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 415).

[01871 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFWGCGRDFECLSGCVCQYYQSCG (SEQ ID NO: 421).

[01881 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFWGCGRDFECLTGCVCQYYQSCG (SEQ ID NO: 422).

[01891 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFWGCGRDFECLEGCVCQYYQSCG (SEQ ID NO: 423).

[0190] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCLCQYYQSCG (SEQ ID NO: 424).

[0191] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCICQYYQSCG (SEQ ID NO: 425).

[0192] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQYYQSCS (SEQ ID NO: 431).

[01931 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNILLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 435).

[0194] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVLQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 386).

[0195] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNILLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 547).

[01961 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNILQPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 548).

[0197] In certain embodiments, one or more amino acids in the sequence of a non naturally occurring VEGF-A binding CKP provided herein are substituted with unnatural amino acids. In certain embodiments, the one or more amino acids are substituted with the same unnatural amino acid. In certain embodiments, the one or more amino acids are each substituted with a different unnatural amino acid. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises an unnatural amino acid at any amino acid position in LI, L2, L3, L4, and/or L5, with respect to scaffold structure I.

[0198] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 216), wherein the N-terminal glycine is capped with C(=)-oxetane-3yl.

[0199] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAXCVCQYYQSCG (SEQ ID NO: 568, wherein X is ornithine.

[0200] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XCNIMLPYWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 361), wherein X is N-acetylglycine.

[0201] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPXWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 362), wherein X is sulfotyrosine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPXWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 362), wherein X is 3,4 difluoro-L-phenylalanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPXWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 362), wherein X is 3,4 dichloro-L-phenylalanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPXWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 362), wherein X is 4 chloro-L-phenylalanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPXWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 362), wherein X is 3-F,4 Cl-L-phenylalanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPXWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 362), wherein X is 2-pyridone (NH para)-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPXWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 362), wherein X is pyridone (NH meta)-L-alanine.

[02021 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 218), wherein X is norleucine.

[02031 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFXGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 219), wherein X is1-naphthylalanine.

[0204] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFXGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 219), wherein X is 2-naphthylalanine.

[0205] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XCNIMLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 221), wherein X is PEG6-propargylglycine.

[02061 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPYWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 365), wherein X is norleucine.

[0207] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 144), wherein X is norleucine.

[02081 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 145), wherein X is norleucine.

[0209] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXiLPFWGCGRDF-D/E-CVS-N/K/X2 CICQYYQSCG (SEQ ID NO: 540) wherein Xi is norleucine and X 2 is omithine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPFWGCGRDFECVSKCICQYYQSCG (SEQ ID NO: 545) wherein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXiLPFWGCGRDFECVSX2CICQYYQSCG (SEQ ID NO: 546) wherein Xi is norleucine and X 2 is omithine. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXiLPFWGCGRDF-N/K/X2-CVS-D/E-CICQYYQSCG (SEQ ID NO: 541), wherein Xi is norleucine and X 2 is omithine.

[0210] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPFWGCGRDFKCVS-D/E-CICQYYQSCG

(SEQ ID NO: 561, herein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence CNIXLPFWGCGRDFKCVSDCICQYYQSCG (SEQ ID NO: 562, herein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence CNIXLPFWGCGRDFKCVSECICQYYQSCG (SEQ ID NO: 563, herein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIX1LPFWGCGRDFX2CVS-D/E CICQYYQSCG (SEQ ID NO: 564, herein X1 is norleucine and X2 is ornithine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIX1LPFWGCGRDFX2CVSDCICQYYQSCG (SEQ ID NO: 565, herein X1 is norleucine and X2 is ornithine. In certain embodiments, the non-naturally occurring VEGF A binding CKP comprises the amino acid sequence GCNIX1LPFWGCGRDFX2CVSECICQYYQSCG (SEQ ID NO: 566, herein X1 is norleucine and X2 is ornithine.

[0211] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 146), wherein X is norleucine.

[0212] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIX1LPYWGCGRDF-D/E-CME-N/K/X2 CICQYYQSCG (SEQ ID NO: 538) wherein X1 is norleucine and X2 is ornithine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPYWGCGRDFECMEKCICQYYQSCG (SEQ ID NO: 543), wherein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIX1LPYWGCGRDFECMEX2CICQYYQSCG (SEQ ID NO: 544), wherein X1 is norleucine and X2 is ornithine.

[02131 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIX1LPYWGCGRDF-N/K/X2-CME-D/E CICQYYQSCG (SEQ ID NO: 539) wherein X1 is norleucine and X2 is ornithine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPYWGCGRDFKCME-D/E-CICQYYQSCG (SEQ ID NO: 555) wherein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPYWGCGRDFKCMEDCICQYYQSCG (SEQ ID NO: 556) wherein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence

GCNIXLPYWGCGRDFKCMEECICQYYQSCG (SEQ ID NO: 557) wherein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIX1LPYWGCGRDFX2CME-D/E-CICQYYQSCG (SEQ ID NO: 558) wherein X1 is norleucine and X2 is ornithine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIX1LPYWGCGRDFX2CMEDCICQYYQSCG (SEQ ID NO: 559) wherein X1 is norleucine and X2 is ornithine. In certain embodiments, the non-naturally occurring VEGF A binding CKP comprises the amino acid sequence GCNIX1LPYWGCGRDFX2CMEECICQYYQSCG (SEQ ID NO: 560) wherein X1 is norleucine and X2 is ornithine.

[0214] In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVX1QPYWGCGPDI-D/E-CLS-N/K/X2 CICHWYNSCG (SEQ ID NO: 534), wherein X1 is norleucine and X2 is ornithine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVXQPYWGCGPDIDCLSKCICHWYNSCG (SEQ ID NO: 536), wherein X is norleucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVX1QPYWGCGPDIDCLSX2CICHWYNSCG (SEQ ID NO: 537), wherein X1 is norleucine and X2 is ornithine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVX1QPYWGCGPDI-N/K/X2-CLS-D/E-CICHWYNSCG (SEQ ID NO: 535), wherein X1 is norleucine and X2 is ornithine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVXQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 224), wherein X is norleucine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVXQPYWGCGPDIKCLS-D/E-CICHWYNSCG (SEQ ID NO: 549), wherein X is norleucine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVXQPYWGCGPDIKCLSDCICHWYNSCG (SEQ ID NO: 550), wherein X is norleucine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVXQPYWGCGPDIKCLSECICHWYNSCG (SEQ ID NO: 551), wherein X is norleucine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVX1QPYWGCGPDIX2CLS-D/E-CICHWYNSCG (SEQ ID NO: 552), wherein X1 is norleucine and X2 is ornithine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVX1QPYWGCGPDIX2CLSDCICHWYNSCG (SEQ ID NO: 553), wherein X1 is norleucine and X2 is ornithine. In certain embodiments the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVX1QPYWGCGPDIX2CLSECICHWYNSCG (SEQ ID NO: 554), wherein X1 is norleucine and X2 is ornithine.

[0215] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLXFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 413), wherein X is gamma-benzyl-L-proline. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLXFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 413), wherein X is gamma (4-fluoro-benzyl)-L-proline. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLXFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 413), wherein X is 4-OH L-proline. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLXFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 413), wherein X is 4-fluoro-L-proline. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLXFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 413), wherein X is 4-[4 (trifluoromethyl)benzyl]-L-proline.

[02161 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYXGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 417), wherein X is N-methyl indole. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYXGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 417), wherein X is N-ethyl indole. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYXGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 417), wherein X is N-isopropyl indole. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYXGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 417), wherein X is 5-aza indole.

[0217] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 4-methyl-L-phenylalanine. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 2 naphthyl-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 2-quinolyl-Alanine. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 4,4' biphenyl-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 3-(3-quinolinyl)-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 3-(2 quinolinyl)-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 3-(2-quinoxalinyl)-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 4 methyl-2-pyridyl-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 4-ethyl 2-pyridyl-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is benzothiazole-L-alanine. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is benzothiophene-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDXECLAGCVCQYYQSCG (SED ID NO: 419), wherein X is 3-(3 isoquinolinyl)-L-alanine.

[02181 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECXAGCVCQYYQSCG (SEQ ID NO: 420), wherein X is t-butyl-L-alanine (also known as L-Nepentylglycine). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECXAGCVCQYYQSCG (SEQ ID NO: 420), wherein X is 3-cyclobutyl-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECXAGCVCQYYQSCG (SEQ ID NO: 420), wherein X is 3 cyclopentyl-L-alanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECXAGCVCQYYQSCG (SEQ ID NO: 420), wherein X is 5,5,5 Trifluoro-L-leucine.

[0219] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCXCQYYQSCG (SEQ ID NO: 426), wherein X is L-tert-Leucine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCXCQYYQSCG (SEQ ID NO: 426), wherein X is t-butyl L-alanine (also known as L-Nepentylglycine). In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCXCQYYQSCG (SEQ ID NO: 426), wherein X is L cyclopentylglycine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCXCQYYQSCG (SEQ ID NO: 426), wherein X is 3-cyclopentyl-L-alanine. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCXCQYYQSCG (SEQ ID NO: 426), wherein X is L cyclobutyl-L-glycine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCXCQYYQSCG (SEQ ID NO: 426), wherein X is 3-cyclobutyl-L-alanine. In certain embodiments, the non naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCXCQYYQSCG (SEQ ID NO: 426), wherein X is 5,5,5 Trifluoro-L-leucine.

[0220] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQXYQSCG (SEQ ID NO: 428), wherein X is 2-pyridone. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQXYQSCG (SEQ ID NO: 428), wherein X is 3,4 hydroxy-L-phenylalanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQXYQSCG (SEQ ID NO: 428), wherein X is 3,4 fluoro phenylalanine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQXYQSCG (SEQ ID NO: 428), wherein X is 3-fluoro,4-OH-L-phenylalanine.

[0221] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQYXQSCG (SEQ ID NO: 430), wherein X is 2-Chloro-L-Tyrosine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQYXQSCG (SEQ ID NO: 430), wherein X is 2 methyl-L- tyrosine. In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQYXQSCG (SEQ ID NO: 430), wherein X is 2-ethyl-L-tyrosine, or 4-(naphthalen-1-ol-)-L-alanine.

[0222] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPYWGCGRDFECLAGCVCQYYQSCX (SEQ ID NO: 432), wherein X is D-serine, L-beta-homoserine, L-beta-alanine, N-alpha methylglycine, glycine with its carboxy terminus converted to an ester of glycerol, glycine with its carboxy terminus converted to an ester of glycol, glycine with its carboxy terminus converted to an ester of oxetanyl alcohol, or glycine morpholine amide.

[02231 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXQPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 436), wherein X is norleucine.

[0224] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXiLPYWGCGRDFECX2EQCICQYYQSCG (SEQ ID NO: 437). In certain embodiments, Xi and X2 are the same unnatural amino acid. In certain embodiments, Xi and X2 are different unnatural amino acids. In certain embodiments, Xi and X 2 are norleucine. In certain embodiments, Xi is norleucine and X2 is 3-cyclobutyl L-alanine.

[0225] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXLPYWGCGRDFECLEQCICQYYQSCG (SEQ ID NO: 438), wherein X is norleucine.

[02261 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIXiLPYWGCGRDFECX2EQCX3CQYYQSCG (SEQ ID NO: 439). In certain embodiments, Xi, X 2 , and/orX3 are the same unnatural amino acid. In certain embodiments, Xi, X 2, and/or X3 are not the same unnatural amino acid. In certain embodiments, Xi is norleucine, X2 is 3-cyclobutyl-L-alanine, and X 3 is cyclobutyl-L glycine. In certain embodiments, Xi is norleucine, X 2 is 3-cyclobutyl-L-alanine, and X3 is 3 cyclobutyl-L-alanine. In certain embodiments, Xi is norleucine, X 2 is 3-cyclobutyl-L alanine, and X 3 is norleucine.

[02271 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence CNIXiQPYWGCGRDFECX2EQCX3CQYYQSCG (SEQ ID NO: 440). In certain embodiments, Xi, X2, and/or X3 are the same unnatural amino acid. In certain embodiments, Xi, X 2, and/or X 3 are not the same unnatural amino acid. In certain embodiments, Xi is norleucine, X2 is 3-cyclobutyl-L-alanine, and X 3 is cyclobutyl-L-glycine. In certain embodiments, Xi is norleucine, X2 is 3-cyclobutyl-L-alanine, and X3 is 3 cyclobutyl-L-alanine.

[02281 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNILLPYWGCGRDFECXEQCICQYYQSCG (SEQ ID NO: 441), wherein X is 3-cyclobutyl-L-alanine or t-butyl-L-alanine (also known as L Nepentylglycine).

[0229] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNILLPYWGCGRDFECMEQCXCQYYQSCG (SEQ ID NO: 442), wherein X is cyclobutyl-L-glycine or 3-cyclobutyl-L-alanine.

[0230] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XiCNIX2LPYWGCGRDFECMEQCICQYYQSCX3 (SEQ ID NO: 443). In certain embodiments, Xi, X 2 , and/or X3 are the same unnatural amino acid. In certain embodiments, Xi, X 2, and/or X3 are not the same unnatural amino acid. In certain embodiments, Xi is N-acetylglycine, X2 is norleucine, and X 3 is glycine amide.

[0231] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XiCNILLPYWGCGRDFECMEQCICQYYQSCX2 (SEQ ID NO: 444). In certain embodiments, Xi and X2 are the same unnatural amino acid. In certain embodiments, Xi and X2 are different unnatural amino acids. In certain embodiments, Xi is N-acetylglycine and X2 is glycine amide.

[0232] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XiCNILQPYWGCGRDFECMEQCICQYYQSCX2 (SEQ ID NO: 445). In certain embodiments, Xi and X2 are the same unnatural amino acid. In certain embodiments, Xi and X2 are different unnatural amino acids. In certain embodiments, Xi is N-acetylglycine and X2 is glycine amide.

[0233] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XiCNILQPYWGCGRDFECLEQCICQYYQSCX2 (SEQ

ID NO: 446). In certain embodiments, Xi and X2 are the same unnatural amino acid. In certain embodiments, Xi and X2 are different unnatural amino acids. In certain embodiments, Xi is N-acetylglycine and X2 is glycine amide.

[0234] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVLQPYWGCGPDIDCXSNCICHWYNSCG (SEQ ID NO: 447), wherein X is 3-cyclobutyl-L-alanine or t-butyl-L-alanine (L-Nepentylglycine).

[0235] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVLQPYWGCGPDIDCLSNCXCHWYNSCG (SEQ ID NO: 448), wherein X is cyclobutyl-L-glycine.

[0236] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVXiQPYWGCGPDIDCX2SNC2X3CHWYNSCG (SEQ ID NO: 449). In certain embodiments, Xi, X 2 , and/or X3 are the same unnatural amino acid. In certain embodiments, Xi, X 2, and/or X3 are not the same unnatural amino acid. In certain embodiments, Xi is norleucine, X2 is 3-cyclobutyl-L-alanine, and X 3 is cyclobutyl-L glycine. In certain embodiments, Xi is norleucine, X 2 is 3-cyclobutyl-L-alanine, and X3 is 3 cyclobutyl-L-alanine.

[0237] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVLQPYWGCGPDIDCXiSNC2X2CHWYNSCG (SEQ ID NO: 450). In certain embodiments, Xi and X2 are the same unnatural amino acid. In certain embodiments, Xi and X 2 are different unnatural amino acids. In certain embodiments, Xi is 3-cyclobutyl-L-alanine, and X 2 is cyclobutyl-L-glycine. In certain embodiments, Xi is 3-cyclobutyl-L-alanine, and X 2 is 3-cyclobutyl-L-alanine.

[02381 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XiCDVLQPYWGCGPDIDCX2SNC2X3CHWYNSCX4 (SEQ ID NO: 451). In certain embodiments, Xi, X2, X3, and/or X4 are the same unnatural amino acid. In certain embodiments, Xi, X2, X 3 , and/or X4 are not the same unnatural amino

acid. In certain embodiments, Xi is N-acetylglycine, X2 is 3-cyclobutyl-L-alanine, X3 is cyclobutyl-L-glycine, and X4 is glycine amide. In certain embodiments, Xi is acetylglycine, X2 is cyclobutyl-L-alanine, X3 is cyclobutyl-L-alanine, and X 4 is glycine amide

[0239] In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XiCDVX2QPYWGCGPDIDCLSNCICHWYNSCX3 (SEQ ID NO: 452). In certain embodiments, Xi, X2, and/or X3 are the same unnatural amino acid. In certain embodiments, Xi, X 2, and/or X3 are not the same unnatural amino acid. In certain embodiments, Xi is N-acetylglycine, X2 is norleucine, and X 3 is glycine amide

[02401 In certain embodiments, the non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence XiCDVLQPYWGCGPDIDCLSNCICHWYNSCX2 (SEQ ID NO: 453). In certain embodiments, Xi and X2 are the same unnatural amino acid. In certain embodiments, Xi and X2 are different unnatural amino acids. In certain embodiments, Xi is N-acetylglycine and X2 is glycine amide

[0241] In certain embodiments, the C-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, the N-terminus of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is modified (such as capped). In certain embodiments, both the C- and N termini of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A are modified (such as capped). In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated. In certain embodiments, the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated. In certain embodiments, the C-terminal carboxyl group of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is amidated and the N-terminal amine of the non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A is acetylated.

Structural Characteristics

[0242] In certain embodiments, the structure of a non-naturally occurring VEGF Abinding CKP provided herein has a disulfide bond connectivity that is different from the WT EETI-II protein, i.e., different from the C1-C4, C2-C5, and C3-C6 disulfide bond pattern characteristic of WT EETI-II. In certain embodiments, a non-naturally occurring VEGF-A binding CKP provided herein has a disulfide bond connectivity of C1-C4, C2-C3, and C5-C6. Methods of determining the disulfide bond connectivity of, e.g., a non-naturally occurring VEGF-A binding CKP, include, e.g., by solving and analyzing the co-crystal structure of a non-naturally occurring VEGF-A binding CKP in complex with VEGF-A, via mass spectrometry following partial reduction alkylation, or via mass spectrometry following proteolytic digestion, performing structure calculations as described in Sampoli et al. (2000) ProteinsStruct Funct Gen. 40, 168-174, etc.

[0243] In certain embodiments, the non-naturally occurring VEGF-A binding CKP and has an alpha helix content of at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about

%, or at least about 50%, including any range in between these values. In certain embodiments, at least 7, at least 8, at least 9, at least 10, at least 11, at least 12, at least 13, at least 14, at least 15, at least 16, at least 17, or at least 18 amino acids of the non-naturally occurring VEGF-A binding CKP form the alpha helix. In certain embodiments, the non naturally occurring VEGF-A binding CKP has a disulfide bond connectivity of C1-C4, C2 C3, and C5-C6 and an alpha helix content of at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, or at least about 50%, including any range in between these values. In certain embodiments, the alpha helix content of a non-naturally occurring VEGF-A binding CKP is determined by, e.g., circular dichroism (CD), optical rotary dispersion (ORD), nuclear magnetic resonance (NMR), by solving and analyzing the co-crystal structure of a non naturally occurring VEGF-A binding CKP in complex with VEGF-A, via mass spectrometry following partial reduction alkylation, or via mass spectrometry following proteolytic digestion.

[0244] In certain embodiments, a non-naturally occurring VEGF-A binding CKP provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises an Li comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33); an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFWGCKQDSDCLAGCVCQYYQSCG (SEQ ID NO: 52).

[0245] In certain embodiments, a non-naturally occurring VEGF-A binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises an Li comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33); an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFWGCKQDSDCLAGCVCQYYQSCG (SEQ ID NO: 52).

[0246] In certain embodiments, the non-naturally VEGF-A binding CKP provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A binding CKP, wherein the second VEGF-A binding CKP comprises an Li comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33); an L2 comprising the amino acid sequence GRDFE (SEQ ID NO: 97); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A binding CKP provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 102).

[0247] In certain embodiments, the non-naturally occurring VEGF-A binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises an LI comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33); an L2 comprising the amino acid sequence GRDFE (SEQ ID NO: 97); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCNIMLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 102).

[0248] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A-binding CKP comprises an Li comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35); an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A-binding CKP comprises the amino acid sequence GCDVMQPYWGCKQDSDCLAGCVCHWYNSCG (SEQ ID NO: 55).

[0249] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises an Li comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35); an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVMQPYWGCKQDSDCLAGCVCHWYNSCG (SEQ ID NO: 55).

[0250] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP protein provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A-binding CKP, wherein the second VEGF-A-binding CKP comprises an LI comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35); an L2 comprising the amino acid sequence GPDID (SEQ ID NO: 118); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein competes for binding to VEGF-A with a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A-binding CKP comprises the amino acid sequence GCDVMQPYWGCGPDIDCLAGCVCHWYNSCG (SEQ ID NO: 123).

[0251] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises an Li comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35); an L2 comprising the amino acid sequence GPDID (SEQ ID NO: 118); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP provided herein binds the same epitope on VEGF-A bound by a second non-naturally occurring VEGF-A-binding CKP, wherein the second non-naturally occurring VEGF-A binding CKP comprises the amino acid sequence GCDVMQPYWGCGPDIDCLAGCVCHWYNSCG (SEQ ID NO: 123).

[0252] In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope of VEGF-A comprising at least one, at least two, at least three, at least four, at least five, at least six, at least seven, at least eight, at least nine, at least ten, or more than ten amino acids selected from the group consisting of V14, V15, F17, D19,Y21, Q22, Y25,146, K48, N62, D63, L66, M81,183, K84, P85, H86, Q87, G88, Q89, 191, C104, R105, and P106. In certain embodiments, a non-naturally occurring VEGF-A binding CKP provided herein binds an epitope of VEGF-A comprising K48, N62, and D63. In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope of VEGF-A comprising H86. In certain embodiments, non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope of VEGF-A comprising Y21, Y25, and P106. In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope of VEGF-A comprising M81, D19, and Q22. In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope of VEGF-A comprising F17, M81, and 191. In certain embodiments, non naturally occurring VEGF-A-binding CKP provided herein binds an epitope of VEGF-A comprising V14, F17, D19, Q22, M81, and 191. In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope of VEGF-A comprising Q22 and Y25.

[0253] In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope on VEGF-A that overlaps the epitope of VEGF-A bound by the anti-VEGF-A antibody G6.31 (Fuh et al. (2006) J Biol. Chem. 281, 6625-6631). In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope on VEGF-A that overlaps with the epitope of VEGF-A bound by Flt-1. In certain embodiments, a non-naturally occurring VEGF-A-binding CKP provided herein binds an epitope on VEGF-A that overlaps with the epitope of VEGF-A bound by bevacizumab.

Functional Characteristics

[0254] In certain embodiments, a non-naturally occurring CKP that "specifically binds" VEGF-A (such as a human VEGF-A, a mouse VEGF-A, and/or a rat VEGF-A) has a binding affinity (Kd) value of no more than about 1 x 10-7 M, preferably no more than about 1 x 108 and most preferably no more than about 1 x 10-9 M) but has a binding affinity for a homologue of VEGF-A or other growth factor which is at least about 50-fold, or at least about 500-fold, or at least about 1000-fold, weaker than its binding affinity for VEGF-A.

[0255] In certain embodiments, the extent of binding of a non-naturally occurring VEGF-A-binding CKP provided herein to, e.g., a non-target protein (e.g., a homolog of VEGFA such as VEGF-B, VEGF-C and VEGF-D) or other growth factors (such as PlGF, EGF, NGF, IGF and PDGF) is less than about 10% of the binding of the non-naturally occurring VEGF-A-binding CKP to VEGF-A as determined by methods known in the art, such as ELISA, fluorescence activated cell sorting (FACS) analysis, or radioimmunoprecipitation (RIA). Specific binding can be measured, for example, by determining binding of a molecule compared to binding of a control molecule, which generally is a molecule of similar structure that does not have binding activity. For example, specific binding can be determined by competition with a control molecule that is similar to the target, for example, an excess of non-labeled target. In this case, specific binding is indicated if the binding of the labeled target to a probe is competitively inhibited by excess unlabeled target. Other methods of assessing the binding of a non-naturally occurring CKP that "specifically binds" VEGF-A are described in the Examples.

[0256] The term "specific binding" or "specifically binds to" or is "specific for" a particular polypeptide or an epitope on a particular polypeptide target as used herein can be

exhibited, for example, by a molecule having a Kd for the target of at least about 10-4 M,

alternatively at least about 10 M, alternatively at least about 10- M, alternatively at least

about 10- M, alternatively at least about 10-8 M, alternatively at least about 10- M,

alternatively at least about 10-10 M, alternatively at least about 10 11 M, alternatively at least

about 10-12 M, or greater. In one embodiment, the term "specific binding" refers to binding where a molecule binds to a particular polypeptide or epitope on a particular polypeptide without substantially binding to any other polypeptide or polypeptide epitope.

[02571 In certain embodiments, the non-naturally occurring VEGF-A-binding CKP binds VEGF-A with a Kd between about 1 pM to about 500 nM. In certain embodiments, the non naturally occurring VEGF-A-binding CKP binds VEGF-A with a Kd between about 1 pM to about 50 pM, between about 50 pM to about 250 pM, between about 250 pM to about 500 pM, between about 500 pM to 750 pM, between about 750 pM to about 1 nM, between about 1 nM to about 25 nM, between about 25 nM to about 50 nM, between 50 nM to about

100 nM, between about 100 nM to about 250 nM, or between about 250 nM to about 500 nM.

[0258] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP binds human VEGF-A, a mouse VEGF-A, and/or a rat VEGF-A. In certain embodiments, non naturally occurring VEGF-A-binding CKP that binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises an L comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33); an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP that binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises the amino acid sequence GCNIMLPFWGCKQDSDCLAGCVCQYYQSCG (SEQ ID NO: 52).

[0259] In certain embodiments, non-naturally occurring VEGF-A-binding CKP binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises an Li comprising the amino acid sequence NIMLPFWG (SEQ ID NO: 33); an L2 comprising the amino acid sequence GRDFE (SEQ ID NO: 97); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence QYYQS (SEQ ID NO: 45), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP that binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises the amino acid sequence GCNIMLPFWGCGRDFECLAGCVCQYYQSCG (SEQ ID NO: 102).

[0260] In certain embodiments, non-naturally occurring VEGF-A-binding CKP that binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises an L comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35); an L2 comprising the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP that binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises the amino acid sequence GCDVMQPYWGCKQDSDCLAGCVCHWYNSCG (SEQ ID NO: 55).

[0261] In certain embodiments, non-naturally occurring VEGF-A-binding CKP that binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises an L comprising the amino acid sequence DVMQPYWG (SEQ ID NO: 35); an L2 comprising the amino acid sequence GPDID (SEQ ID NO: 118); an L3 comprising the amino acid sequence LAG; an L4 comprising the amino acid V, and an L5 comprising the amino acid sequence HWYNS (SEQ ID NO: 46), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP that binds human VEGF-A, a mouse VEGF-A, and a rat VEGF-A comprises the amino acid sequence GCDVMQPYWGCGPDIDCLAGCVCHWYNSCG (SEQ ID NO: 123).

[0262] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP described herein has anIC5ovalue of less than about 0.5 nM, less than about 0.6 nM, less than about 0.7 nM, less than about 0.8 nM, less than about 0.9 nM, or less than about 1.0nM, including any range in between these values.

[02631 In certain embodiments, the non-naturally occurring VEGF-A-binding CKP does not inhibit trypsin protease activity as measured in a peptide substrate cleavage assay (e.g., the peptide substrate cleavage assay described in the Examples).

[0264] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP is resistant to trypsin digestion. In certain embodiments, about 30% or less, about 25% or less, or about 20% or less of the non-naturally occurring VEGF-A-binding CKP is cleaved at Arg13 within loop 2 after 24 h incubation with trypsin at 37C.

[0265] Nucleic acid molecules encoding non-naturally occurring VEGF-A-binding CKPs described herein, expression vectors comprising nucleic acid molecules encoding the non naturally occurring VEGF-A-binding CKP, and cells comprising the nucleic acid molecules are also contemplated. Also provided herein are methods of producing a non-naturally occurring VEGF-A-binding CKP described herein by culturing such cells, expressing the non-naturally occurring VEGF-A-binding CKP, and recovering the non-naturally occurring VEGF-A-binding CKP from the cell culture.

[0266] In certain embodiments, a non-naturally occurring VEGF-A-binding CKP is produced via in vitro translation, as described elsewhere herein.

[02671 In certain embodiments, a non-naturally occurring VEGF-A-binding CKP is generated via chemical peptide synthesis, e.g., by grafting chemically synthesized LI, L2, L3, L4, and/or L5 peptides onto an scaffold framework (such as scaffold structure I), or by chemically synthesizing the entire non-naturally occurring VEGF-A-binding CKP.

Non-Naturally Occurring Cystine Knot Peptides (CKPs) That Bind Human Low Density Lipoprotein Receptor (LDL)-Related Protein 6 (LRP6)

[0268] LDL receptors are transmembrane cell surface proteins involved in receptor mediated endocytosis of lipoprotein and protein ligands. Human LDL receptor-related protein 6 (LRP6) (Accession Nos: NM_002336 (mRNA) and NP002327 (protein); UniProtKB: 075581) functions as a receptor or, with Frizzled, a co-receptor for Wnt and thereby transmits the canonical Wnt/beta-catenin signaling cascade (Katoh et al. (2007) Clin CancerRes 13:4042-4045). Through its interaction with the Wnt/beta-catenin signaling cascade, LRP6 plays a role in the regulation of cell differentiation, proliferation, and migration, and in the development of many cancer types (Li et al. (2004) Oncogene 23:9129 9135; Tung et al. (2012) PLoS ONE 7(5): e36565. doi:10.1371/joumal.pone.0036565; Liu et al. (2010) Proc Natl Acad Sci USA 107:5136-5141).

[0269] Wnt signaling is involved in many biological pathways. With respect to diseases it is involved with cancer and metastatic disease, osteoporosis and other bone metabolism and disease, neuronal and neurodegenerative disease, rheumatoid arthritis and other inflammatory disease. This inhibition of Wnt signaling by blockade of LRP6 may have a wide range of therapeutic utility. Bone loss is a serious medical problem, not only during postmenopausal osteoporosis, but also in rheumatoid arthritis. Bone is degraded in multiple myeloma and in bone metastases. Therapeutic strategies aimed at strengthening bone, fracture prevention, or restoration of damaged bone are therefore of very high interest (Kawai et al. (2011) Nat. Rev. Drug Discov. 10, 141-156; Mason and Williams (2010) J Osteoporosis, vol. 2010, Article ID 460120, 9 pages; doi:10.4061/2010/460120). The Wnt pathway inhibitors DKIK1 and SOST, because of their roles in suppressing new bone formation, are considered highly promising therapeutic targets; antibodies with neutralizing the function of SOST show significant preclinical activity (Ominsky et al. (2010) J Bone Miner. Res. 25, 948-959) and are now in human clinical trials (Padhi et al. (2011) J. Bone Miner. Res. 26, 19-26.

[02701 Misregulated Wnt signaling is implicated in diseases ranging from osteoporosis to cancer (Clevers (2006) Cell 127: 469-80; MacDonald et al. 2009. Dev Cell 17: 9-26; Nusse (2008) Cell Res 18: 523-7; Polakis (2007) Curr Opin Genet Dev 17: 45-51). This list has expanded to include metabolic disorders (Mani et al. (2007) Science 315: 1278-82 and neurodegeneration (Caricasole et al. (2004) JNeurosci 24: 6021-7; De Ferrari et al. (2007) Proc Natl Acad Sci USA 104: 9434-9). An especially clear link exists between mutations of the protein adenomatous polyposis coli (APC), which prevent effective regulation ofp catenin levels, and colorectal cancers (Polakis (2007) Curr Opin Genet Dev 17: 45-51). Also of particular note is the strong genetic relationship between LRP5 and bone homeostasis. Loss-of-function mutations in LRP5 cause the autosomal recessive disorder osteoporosispseudoglioma syndrome (OPPG), characterized by low bone mass, ocular defects and a predisposition to fractures (Gong et al. (2001) Cell 107: 513-23.

[02711 Provided herein is a non-naturally occurring CKP that binds to human low density lipoprotein receptor-related protein 6 (LRP6), wherein the non-naturally CKP comprises the following cystine scaffold structure (i.e., scaffold structure I):

ZiC1L1C2L2C3L3C4L4C5L5C6Z2 (I)

wherein: Zi and Z2 are any amino acid;

Li is Loop 1 and has a structure selected from the group consisting of: XiX2X3X4X5X6, XiX2X3X4X5X6X7, XiX2X3X4X5X6X7X8, XiX2X3X4XX6X7X8X9, and

XiX2X3X4X5X6X7XX9Xio, wherein each of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure: XiX2X3X4X, wherein each of Xi - X5 is any amino acid; L3 is Loop 3 and has the structure: XiX2 X 3 wherein each of Xi - X3 is any amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid; and L5 is Loop 5 and has the structure: XiX2 X 3X 4 X, wherein each of Xi - X5 is any amino acid.

[0272] In certain embodiments, Zi and/or Z 2 of the non-naturally occurring cystine knot peptide (CKP) that binds to LRP6 is G. In certain embodiments, Zi and/or Z 2 comprise more than one amino acid. In certain embodiments, Zi and/or Z 2 comprise 4 amino acids. In certain embodiments, Zi and/or Z 2 comprise 5 amino acids.

[0273] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI wherein Xi is an amino acid selected from R, V, M, A, G, N, S, and E; wherein X2 is an amino acid selected from T, N, S, G, R, and A; wherein X3 is an amino acid selected from N, R, H, V, K, S, G, I, and Y; wherein X4 is an amino acid selected from R, V, N, I, K, S, and T; wherein X5 is an amino acid selected from V, R, K, I, T, S, L, and N; and wherein X6is an amino acid selected from K, G, A, I, R, N, S, and V. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an Li wherein X7 is an amino acid selected from G, R, K, E, P, and T. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an Li wherein X 8 is an amino acid selected from G, R, K, Q, A, and S. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI wherein X9 is an amino acid selected from R or G. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI wherein Xio is an amino acid selected from E, W, and G. In certain embodiments, the non-naturally occurring LRP6 binding CKP comprises an L5 wherein Xi is an amino acid selected from G, S, N, Y, A, and R; wherein X2 is an amino acid selected from P, G, S, V, E, R, F, and D; wherein X 3 is an amino acid selected from N, G, S, E, P, K, H, and R; wherein X4 is an amino acid selected from G, R, H, S, Q, V, and D; and wherein X5 is an amino acid selected from F, D, N, R, G, Y, S, and T. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an L2 wherein Xi is K, X2 is Q, X 3 is D, X 4 is S, and X 5 is D. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an L3 wherein Xi is L, X 2 is A, and X 3 is G. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an L4 wherein Xi is V.

[0274] In certain embodiments, the non-naturally occurring LRP6-binding CKP competitively inhibits the binding of a competing molecule to human LRP6. In certain embodiments, the competing molecule is an anti-LRP6 antibody. In certain embodiments, the competing molecule is a second non-naturally occurring LRP6-binding CKP.

[0275] Non-naturally occurring LRP6-binding CKPs that bind to overlapping or similar areas on a target can be identified by competitive inhibition/binding assays. Such assays are well known in the art and are described in, e.g., S. J. Mather (ed.) 1996. CurrentDirectionsin RadiopharmaceuticalResearch and Development, 169- 179, Kluwer Academic Publishers; Zettner (1973) Clin. Chem. 19, 699-705; Gao (2012) Analytical Methods 4, 3718-3723.

[0276] In certain embodiments, the non-naturally occurring LRP6-binding CKP binds the same epitope of human LRP6 bound by a second non-naturally occurring LRP6-binding CKP comprising an L that comprises the amino acid sequence V/R/N/S/E/G-N/S/G/R R/V/K/S/N/I/Y-V/N/I/R/S/T-R/K/I/N-G/I/R/K/S/A (SEQ ID NO: 185) or A/R/M/V/G/S N/T/S/A-R/N/H-V/R/K-K/V/I-R/K/A/N/S/V-T/G/R/K/P-S/G/R/A (SEQ ID NO: 186) or R/A/Q-S/A-G/S/N/I-N/K-T/S/L/R-I/R/V-R/E/K-K/Q/A/R-R/G/Q-E/W/G/R (SEQ ID NO: 187); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence G/S/N/Y/A/R-P/G/S/V/E/R/F/D-N/G/S/E/P/K/H/R G/R/H/S/Q/V/D-F/D/N/R/G/Y/S/T (SEQ ID NO: 188), with reference to scaffold structure I.

[02771 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence V/R/N/S/E/G-N/S/G/R R/V/K/S/N/I/Y-V/N/I/R/S/T-R/K/I/N-G/I/R/K/S/A (SEQ ID NO: 185) or A/R/M/V/G/S N/T/S/A-R/N/H-V/R/K-K/V/I-R/K/A/N/S/V-T/G/R/K/P-S/G/R/A (SEQ ID NO: 186) or R/A-S-G/S/N-N/K-T/S/L-I/R-R/E-K/Q/A-R/G-E/W/G (SEQ ID NO: 187) ), with reference to scaffold structure I. In certain embodiments, the non-naturally occurring LRP6-binding CKP further comprises an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93). In certain embodiments, the non-naturally occurring LRP6-binding CKP further comprises an L3 that comprises the amino acid sequence LAG. In certain embodiments, the non-naturally occurring LRP6-binding CKP further comprises an L4 that comprises the amino acid V. In certain embodiments, the non-naturally occurring LRP6-binding CKP further comprises an L5 that comprises the amino acid sequence G/S/N/Y/A/R-P/G/S/V/E/R/F/D N/G/S/E/P/K/H/R-G/R/H/S/Q/V/D-F/D/N/R/G/Y/S/T (SEQ ID NO: 188

[02781 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an Li and/or L5 of any one of the non-naturally occurring LRP6-binding CKPs disclosed herein. In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an Li that comprises an amino acid sequence set forth in any one of SEQ ID NOs: 147-168 and 367, with respect to scaffold structure I. In certain embodiments, the non naturally occurring LRP6-binding CKP further comprises an L2 that comprises the amino acid sequence set forth in SEQ ID NO: 93. In certain embodiments, the non-naturally occurring LRP6-binding CKP further comprises an L3 that comprises the amino acid sequence LAG. In certain embodiments, the non-naturally occurring LRP6-binding CKP further comprises an L4 comprising the amino acid V. In certain embodiments, the non naturally occurring LRP6-binding CKP further comprises an L5 that comprises an amino acid sequence set forth in any one of SEQ ID NOs: 19 and 169-184.

[0279] The LI and L5 amino acid sequences described above are provided in Table 18 below:

Table 18

RTNRVKGG (SEQ ID NO: 147) GPNGF (SEQ ID NO: 19)

VNRVRG (SEQ ID NO: 148) SGGRD (SEQ ID NO: 169)

MNHVKARR (SEQ ID NO: 149) GPNGF (SEQ ID NO: 19)

RSVNKI (SEQ ID NO: 150) GSSRN (SEQ ID NO: 170)

VNKIKG (SEQ ID NO: 151) GVEGR (SEQ ID NO: 171)

RNSIKR (SEQ ID NO: 152) SVGHG (SEQ ID NO: 172)

VSNRVNKG (SEQ ID NO: 153) GPNGF (SEQ ID NO: 19)

RGNIIK (SEQ ID NO: 154) NESRG (SEQ ID NO: 173)

RSGNTIRKRE (SEQ ID NO: 155) GGPGG (SEQ ID NO: 174)

ASSNSIRQGW (SEQ ID NO: 156) GPKSN (SEQ ID NO: 175)

RSNRIR (SEQ ID NO: 157) YGHGD (SEQ ID NO: 176)

RSNKLREARG (SEQ ID NO: 158) GSRQD (SEQ ID NO: 177)

VNSVKR (SEQ ID NO: 159) SRGVN (SEQ ID NO: 178)

GSNKIRPR (SEQ ID NO: 160) GPNDF (SEQ ID NO: 179)

NRIRNS (SEQ ID NO: 161) GRGDY (SEQ ID NO: 180)

SRNSIK (SEQ ID NO: 162) ASGSS (SEQ ID NO: 181)

SNYVKR (SEQ ID NO: 163) SPGGR (SEQ ID NO: 182)

RANRVSGR (SEQ ID NO: 164) GPNGF (SEQ ID NO: 19)

SNRVKVRA (SEQ ID NO: 165) GPNGF (SEQ ID NO: 19)

ENRTKG (SEQ ID NO: 166) GFRGT (SEQ ID NO: 183)

GNKIRA (SEQ ID NO: 167) RDRVG (SEQ ID NO: 184)

ANRVKRTS (SEQ ID NO: 168) GPNGF (SEQ ID NO: 19)

QAINRVKRQR (SEQ ID NO: 367)

V/R/N/S/E/G-N/S/G/R- A/R/M/V/G/S-N/T/S/A-R/N/H R/V/K/S/N/I/Y-V/N/I/R/S/T- V/R/K-K/V/I-R/K/A/N/S/V R/K/I/N-G/I/R/K/S/A T/G/R/K/P-S/G/R/A (SEQ ID NO: 185) (SEQ ID NO: 186) G/S/N/Y/A/R-P/G/S/V/E/R/F/D R/A-S-G/S/N-N/K-T/S/L-I/R- N/G/S/E/P/K/H/R R/E-K/Q/A-R/G-E/W/G (SEQ ID G/R/H/S/Q/V/D-F/D/N/R/G/Y/S/T NO: 187) (SEQ ID NO: 188)

[02801 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence RTNRVKGG (SEQ ID NO: 147); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNGF (SEQ ID NO: 19), with reference to with reference to scaffold structure I.

[02811 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence VNRVRG (SEQ ID NO: 148); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence SGGRD (SEQ ID NO: 169), with reference to with reference to scaffold structure I.

[0282] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence MNHVKARR (SEQ ID NO: 149); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNGF (SEQ ID NO: 19), with reference to scaffold structure I.

[02831 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence RSVNKI (SEQ ID NO: 150); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GSSRN (SEQ ID NO: 170), with reference to scaffold structure I.

[0284] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an Li that comprises the amino acid sequence VNKIKG (SEQ ID NO: 151); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GVEGR (SEQ ID NO: 29), with reference to scaffold structure I.

[02851 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence RNSIKR (SEQ ID NO: 152); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence SVGHG (SEQ ID NO: 172), with reference to scaffold structure I.

[02861 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence VSNRVNKG (SEQ ID NO: 153); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNGF (SEQ ID NO: 19), with reference to scaffold structure I.

[0287] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence RGNIIK (SEQ ID NO: 154); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence NESRG (SEQ ID NO: 173), with reference to scaffold structure I.

[02881 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence RSGNTIRKRE (SEQ ID NO: 155); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GGPGG (SEQ ID NO: 174), with reference to scaffold structure I.

[02891 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence ASSNSIRQGW (SEQ ID NO: 156); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPKSN (SEQ ID NO: 175), with reference to scaffold structure I.

[0290] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence RSNRIR (SEQ ID NO: 157); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence YGHGD (SEQ ID NO: 176), with reference to scaffold structure I.

[0291] In certain embodiments, non-naturally occurring LRP6-binding CKP an LI that comprises the amino acid sequence RSNKLREARG (SEQ ID NO: 158); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GSRQD (SEQ ID NO: 177), with reference to scaffold structure I.

[0292] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence VNSVKR (SEQ ID NO: 159); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence SRGVN (SEQ ID NO: 178), with reference to scaffold structure I.

[0293] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence GSNKIRPR (SEQ ID NO: 160); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNDF (SEQ ID NO: 179), with reference to scaffold structure I.

[0294] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an Li that comprises the amino acid sequence NRIRNS (SEQ ID NO: 161); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GRGDY (SEQ ID NO: 180), with reference to scaffold structure I.

[0295] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence SRNSIK (SEQ ID NO: 162); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence ASGSS (SEQ ID NO: 181), with reference to scaffold structure I.

[02961 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence SNYVKR (SEQ ID NO: 163); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence SPGGR (SEQ ID NO: 182), with reference to scaffold structure I.

[0297] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence RANRVSGR (SEQ ID NO: 164); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNGF (SEQ ID NO: 19), with reference to scaffold structure I.

[02981 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence SNRVKVRA (SEQ ID NO: 165); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNGF (SEQ ID NO: 19), with reference to scaffold structure I.

[0299] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence ENRTKG (SEQ ID NO: 166); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GFRGT (SEQ ID NO: 183), with reference to with reference to scaffold structure I.

[03001 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence GNKIRA (SEQ ID NO: 167); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence RDRVG (SEQ ID NO: 184), with reference to scaffold structure I.

[03011 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an LI that comprises the amino acid sequence ANRVKRTS (SEQ ID NO: 168); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNGF (SEQ ID NO: 19), with reference to scaffold structure I.

[0302] In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an Li that comprises the amino acid sequence QAINRVKRQR (SEQ ID NO: 367); an L2 that comprises the amino acid sequence KQDSD (SEQ ID NO: 93); an L3 that comprises the amino acid sequence LAG; an L4 that comprises the amino acid V; and an L5 that comprises the amino acid sequence GPNGF (SEQ ID NO: 19), with reference to scaffold structure I.

[03031 In certain embodiments, the non-naturally occurring LRP6-binding CKP comprises an amino acid sequence set forth in any one of SEQ ID NOs: 189-210 and 366. SEQ ID NOs: 189-210 and 366 are provided below. GCRTNRVKGGCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 189) GCVNRVRGCKQDSDCLAGCVCSGGRDCG (SEQ ID NO: 190) GCMNHVKARRCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 191) GCRSVNKICKQDSDCLAGCVCGSSRNCG (SEQ ID NO: 192) GCVNKIKGCKQDSDCLAGCVCGVEGRCG (SEQ ID NO: 193) GCRNSIKRCKQNSDCLAGCVCSVGHGCG (SEQ ID NO: 194) GCVSNRVNKGCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 195) GCRGNIIKCKQDSDCLAGCVCNESRGCG (SEQ ID NO: 196) GCRSGNTIRKRECKQDSDCLAGCVCGGPGGCG (SEQ ID NO: 197) GCASSNSIRQGWCKQDSDCLAGCVCGPKSNCG (SEQ ID NO: 198) GCRSNRIRCKQDSDCLAGCVCYGHGDCG (SEQ ID NO: 199) GCRSNKLREARGCKQDSDCLAGCVCGSRQDCG (SEQ ID NO: 200) GCVNSVKRCKQDSDCLAGCVCSRGVNCG (SEQ ID NO: 201) GCGSNKIRPRCKQDSDCLAGCVCGPNDFCG (SEQ ID NO: 202) GCNRIRNSCKQDSDCLAGCVCGRGDYCG (SEQ ID NO: 203) GCSRNSIKCKQDSDCLAGCVCASGSSCG (SEQ ID NO: 204)

GCSNYVKRCKQDSDCLAGCVCSPGGRCG (SEQ ID NO: 205) GCRANRVSGRCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 206) GCSNRVKVRACKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 207) GCENRTKGCKQDSDCLAGCVCGFRGTCG (SEQ ID NO: 208) GCGNKIRACKQDSDCLAGCVCRDRVGCG (SEQ ID NO: 209) GCANRVKRTSCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 210) GCQAINRVKRQRCKQDSDCLAGCVCGPNGFCG (SEQ ID NO: 366)

[03041 In certain embodiments, the non-naturally occurring LRP6-binding CKP is a variant of a non-naturally occurring LRP6-binding CKP described herein. In certain embodiments, such a variant comprises at least 1, at least 2, at least 3, at least 4, at least 5, at least 6, at least 7, at least 8, at least 9, or at least 10 amino acid substitutions in one or more of the sequences set forth in SEQ ID NOs: 19, 93, 147-168, 169-184, and 189-210 and/or in the amino acid sequence LAG. In certain embodiments, the amino acid substitution(s) are conservative amino acid substitution(s). In certain embodiments, the amino acid substitutions do not substantially reduce the ability of the non-naturally occurring LRP6-binding CKP to bind human LRP6. For example, conservative alterations (e.g., conservative substitutions as provided herein) that do not substantially reduce LRP6 binding affinity may be made. The binding affinity of a variant of a non-naturally occurring LRP6-binding CKP can be assessed using a method described in the Examples below.

[03051 Conservative substitutions are shown in Table 17 above under the heading of "conservative substitutions." More substantial changes are provided in Table 17 under the heading of "exemplary substitutions," and as further described below in reference to amino acid side chain classes. Amino acid substitutions may be introduced into a variant of a non naturally occurring LRP6-binding CKP and the products screened for a desired activity, e.g., retained/improved LRP6 binding.

[03061 Non-conservative substitutions will entail exchanging a member of one of these classes for another class. An exemplary substitutional variant is an affinity matured non naturally occurring LRP6-binding CKP, which may be conveniently generated, e.g., using phage display based affinity maturation techniques such as those described herein. Briefly, one or more residues in LI, L2, L3, L4, and/or L5 is altered (i.e., added, deleted, or substituted) and the variant LRP6-binding CKP is displayed on phage and screened for LRP6 binding affinity. In certain embodiments of affinity maturation, diversity is introduced into the variable genes chosen for maturation by any of a variety of methods (e.g., error-prone PCR, loop shuffling, or oligonucleotide-directed mutagenesis). A secondary library is then created. The library is then screened to identify any non-naturally occurring CKP variants with the desired affinity for LRP6. In certain embodiments, introducing diversity involves loop-directed approaches, in which several residues in LI, L2, L3, L4, and/or L5 (e.g., about , about 4-6, or about 6-10 residues at a time) are randomized. L1, L2, L3, L4, and/or L5 residues involved in binding a target ligand may be identified, e.g., using alanine scanning mutagenesis or modeling.

[03071 In certain embodiments, a non-naturally occurring CKP that "specifically binds" human LRP6 (i.e., has a binding affinity (Kd) value of no more than about 1 x 10-7 M, preferably no more than about 1 x 108 and most preferably no more than about 1 x 10- M) but has a binding affinity for another LRP protein which is at least about 50-fold, or at least about 500-fold, or at least about 1000-fold, weaker than its binding affinity for LRP6.

[0308] In certain embodiments, the extent of binding of the non-naturally occurring LRP6-binding CKP to a non-target protein (e.g., a LRP6 homolog such as LRP1, LRP1B, LRP2, LRP3, LRP4, LRP5, LRP8, LRP10, LRP11, and LRP12) is less than about 10% of the binding of the non-naturally occurring LRP6-binding CKP to human LRP6 as determined by methods known in the art, such as ELISA, fluorescence activated cell sorting (FACS) analysis, or radioimmunoprecipitation (RIA). Specific binding can be measured, for example, by determining binding of a molecule compared to binding of a control molecule, which generally is a molecule of similar structure that does not have binding activity. For example, specific binding can be determined by competition with a control molecule that is similar to the target, for example, an excess of non-labeled target. In this case, specific binding is indicated if the binding of the labeled target to a probe is competitively inhibited by excess unlabeled target. The term "specific binding" or "specifically binds to" or is "specific for" a particular polypeptide or an epitope on a particular polypeptide target as used herein can be exhibited, for example, by a molecule having a Kd for the target of at least

about 10-4 M, alternatively at least about 10 M, alternatively at least about 10- M,

alternatively at least about 10- M, alternatively at least about 10-8 M, alternatively at least

about 10- M, alternatively at least about 1010 M, alternatively at least about 1011 M,

alternatively at least about 10-12 M, or greater. In one embodiment, the term "specific binding" refers to binding where a molecule binds to a particular polypeptide or epitope on a particular polypeptide without substantially binding to any other polypeptide or polypeptide epitope.

[0309] In certain embodiments, the non-naturally occurring LRP6-binding CKP binds a human LRP6 with a Kd between about 1 pM to about 500 nM. In certain embodiments, the non-naturally occurring LRP6-binding CKP protein that specifically binds LRP6 binds a human LRP6 with a Kd between about 1 pM to about 50 pM, between about 50 pM to about 250 pM, between about 250 pM to about 500 pM, between about 500 pM to 750 pM, between about 750 pM to about 1 nM, between about 1 nM to about 25 nM, between about nM to about 50 nM, between 50 nM to about 100 nM, between about 100 nM to about 250 nM, or between about 250 nM to about 500 nM, including any range in between these values.

[0310] In certain embodiments, the non-naturally occurring LRP6-binding CKP inhibits Wntl signaling, e.g., as determined using methods described in the Examples below.

[0311] Nucleic acid molecules encoding the non-naturally occurring LRP6-binding CKPs described, expression vectors comprising nucleic acid molecules encoding the non naturally occurring LRP6-binding CKPs, and cells comprising the nucleic acid molecules are also contemplated. Also provided herein are methods of producing a non-naturally occurring LRP6-binding CKP by culturing such cells, expressing the non-naturally occurring LRP6 binding CKP, and recovering the non-naturally occurring LRP6-binding CKP from the cell culture.

[0312] In certain embodiments, a non-naturally occurring LRP6-binding CKP is produced via in vitro translation, as described elsewhere herein.

[0313] As described elsewhere herein, a non-naturally occurring LRP6-binding CKP is generated via chemical peptide synthesis, e.g., by grafting chemically synthesized LI, L2, L3, L4, and/or L5 peptides onto an EETI-II framework, or by chemically synthesizing the entire non-naturally occurring LRP6-binding CKP.

[0314] In certain embodiments, the non-naturally occurring LRP6-binding CKP is as a therapeutic agent in the treatment of diseases or conditions wherein excessive LRP6 activity is involved.

Methods of Production

[0315] In certain embodiments, a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP is generated via genetic engineering. A variety of methods for mutagenesis have been previously described (along with appropriate methods for screening or selection). Such mutagenesis methods include, but are not limited to, e.g., error-prone PCR, loop shuffling, or oligonucleotide-directed mutagenesis, random nucleotide insertion or other methods prior to recombination. Further details regarding these methods are described in, e.g., Abou-Nadler et al. (2010)BioengineeredBugs 1, 337-340; Firth et al. (2005) Bioinformatics21, 3314-3315; Cirino et al. (2003) Methods Mol Biol 231, 3-9; Pirakitikulr (2010) Protein Sci 19, 2336-2346; Steffens et al. (2007) J. Biomol Tech 18, 147 149; and others. Accordingly, in certain embodiments, provided is a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP generated via genetic engineering techniques.

[0316] In certain embodiments, a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP is generated via in vitro translation. Briefly, in vitro translation entails cloning the protein-coding sequence(s) into a vector containing a promoter, producing mRNA by transcribing the cloned sequence(s) with an RNA polymerase, and synthesizing the protein by translation of this mRNA in vitro, e.g., using a cell-free extract. A desired variant protein can be generated simply by altering the cloned protein-coding sequence. Many mRNAs can be translated efficiently in wheat germ extracts or in rabbit reticulocyte lysates. Further details regarding in vitro translation are described in, e.g., Hope et al. (1985) Cell 43, 177-188; Hope et al. (1986) Cell 46, 885-894; Hope et al. (1987) EMBO J. 6, 2781-2784; Hope et al. (1988) Nature 333, 635-640; and Melton et al. (1984) Nucl. Acids Res.12, 7057-7070.

[03171 Accordingly, provided are nucleic acid molecules encoding a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP described herein. An expression vector operably linked to a nucleic acid molecule encoding a non naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP is also provided. Host cells (including, e.g., prokaryotic host cells such as E. coli, eukaryotic host cells such as yeast cells, mammalian cells, CHO cells, etc.) comprising a nucleic acid encoding a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP are also provided.

[0318] In certain embodiments, non-naturally occurring VEGF-A-binding CKP or a non naturally occurring LRP6-binding CKP is generated via in vitro translation. Briefly, in vitro translation entails cloning the protein-coding sequence(s) into a vector containing a promoter, producing mRNA by transcribing the cloned sequence(s) with an RNA polymerase, and synthesizing the protein by translation of this mRNA in vitro, e.g., using a cell-free extract. A desired mutant protein can be generated simply by altering the cloned protein-coding sequence. Many mRNAs can be translated efficiently in wheat germ extracts or in rabbit reticulocyte lysates. Further details regarding in vitro translation are described in, e.g., Hope et al. (1985) Cell 43, 177-188; Hope et al. (1986) Cell 46, 885-894; Hope et al. (1987) EMBO

J 6, 2781-2784; Hope et al. (1988) Nature 333, 635-640; and Melton et al. (1984) Nucl. Acids Res.12, 7057-7070.

[0319] In certain embodiments, a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP is generated via chemical synthesis. In certain embodiments, chemically synthesized L, L2, L3, L4, and/or L5 peptides are grafted onto an EETI-II-based framework (such as scaffold structure I) to generate non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP. In certain embodiments the entire non-naturally occurring VEGF-A-binding CKP or the entire non naturally occurring LRP6-binding CKP is chemically synthesized. Methods of solid phase and liquid phase peptide synthesis are well known in the art and described in detail in, e.g., Methods of Molecular Biology, 35, Peptide Synthesis Protocols, (M. W. Pennington and B. M. Dunn Eds), Springer, 1994; Welsch et al. (2010) Curr Opin Chem Biol 14, 1-15; Methods of Enzymology, 289, Solid Phase Peptide Synthesis, (G. B. Fields Ed.), Academic Press, 1997; Chemical Approaches to the Synthesis of Peptides and Proteins, (P. Lloyd-Williams, F. Albericio, and E. Giralt Eds), CRC Press, 1997; Fmoc Solid Phase Peptide Synthesis, A Practical Approach, (W. C. Chan, P. D. White Eds), Oxford University Press, 2000; Solid Phase Synthesis, A Practical Guide, (S. F. Kates, F Albericio Eds), Marcel Dekker, 2000; P. Seneci, Solid-Phase Synthesis and Combinatorial Technologies, John Wiley & Sons, 2000; Synthesis of Peptides and Peptidomimetics (M. Goodman, Editor-in-chief, A. Felix, L. Moroder, C. Tmiolo Eds), Thieme, 2002; N. L. Benoiton, Chemistry of Peptide Synthesis, CRC Press, 2005; Methods in Molecular Biology, 298, Peptide Synthesis and Applications, (J. Howl Ed) Humana Press, 2005; and Amino Acids, Peptides and Proteins in Organic Chemistry, Volume 3, Building Blocks, Catalysts and Coupling Chemistry, (A. B. Hughs, Ed.) Wiley-VCH, 2011.

Chimeric Molecules Comprising a Non-Naturally Occurring EETI-II Protein

[0320] A non-naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) can also be modified if advantageous in a way to form a chimeric molecule comprising the non naturally occurring CKP fused (e.g., recombinantly fused) to another, heterologous polypeptide or amino acid sequence. In certain embodiments, such a chimeric molecule comprises a fusion of a non-naturally occurring CKP described herein (such as a non naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) with an antibody to form, e.g., a divalent molecule or a bispecific molecule.

[0321] In certain embodiments, a chimeric molecule comprises a fusion of a non naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A binding CKP or a non-naturally occurring LRP6-binding CKP) with a second moiety (such as a protein transduction domain) which targets the chimeric molecule for delivery to various tissues, or , e.g., across brain blood barrier, using, for example, the protein transduction domain of human immunodeficiency virus TAT protein (Schwarze et al., 1999, Science 285: 1569-72).

[0322] In certain embodiments, the non-naturally occurring CKP provided herein can be used as bi- or multi-specific (for different target ligands or different epitopes on the same target ligand) in multimer form. For example, a dimeric bispecific non-naturally occurring CKP has one subunit with specificity for a first target protein or epitope and a second subunit with specificity for a second target protein or epitope. Non-naturally occurring CKP protein subunits can be joined in a variety of conformations that can increase the valency and thus the avidity of binding to a target ligand.

[0323] In certain embodiments a chimeric molecule provided herein comprises two or more (such as three, four, five, six, seven, eight, nine, ten, or more than ten) non-naturally occurring CKP proteins. In certain embodiments, a nucleic acid can be engineered to encode two or more copies of a single non-naturally occurring CKP, which copies are transcribed and translated in tandem to produce a covalently linked multimer of identical subunits. In certain embodiments, the nucleic acid can be engineered to encode two or more different non-naturally occurring CKPs, which copies are transcribed and translated in tandem to produce a covalently linked multimer of different subunits that bind, e.g., different epitopes of a single target ligand, or, e.g., different target ligands.

[0324] In another embodiment, such a chimeric molecule comprises a fusion of a non naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A binding CKP or a non-naturally occurring LRP6-binding CKP) with a tag polypeptide which provides an epitope to which an anti-tag antibody can selectively bind. The epitope tag is generally placed at the amino- or carboxyl- terminus of the non-naturally occurring CKP. The presence of such epitope-tagged forms of the non-naturally occurring CKP protein can be detected using an antibody against the tag polypeptide. Also, provision of the epitope tag enables the non-naturally occurring CKP to be readily purified by affinity purification using an anti-tag antibody or another type of affinity matrix that binds to the epitope tag. Various tag polypeptides and their respective antibodies are known in the art. Examples include poly histidine (poly-His) or poly-histidine-glycine (poly-His-Gly) tags; the flu HA tag polypeptide and its antibody 12CA5 (Field et al. (1988) Mol. Cell. Biol. 8, 2159-2165); the c-myc tag and the 8F9, 3C7, 6E10, G4, B7 and 9E10 antibodies thereto (Evan et al. (1985) Mol. Cell. Biol. , 3610-3616]; and the Herpes Simplex virus glycoprotein D (gD) tag and its antibody (Paborsky et al. (1990) ProteinEng., 3, 547-553). Other tag polypeptides include the Flag peptide (Hopp et al. (1988) BioTechnology, 6,1204-1210); the KT3 epitope peptide (Martin et al. (1992) Science, 255, 192-194]; an a-tubulin epitope peptide (Skinner et al. (1991) J. Biol. Chem. 266, 15163-15166); and the T7 gene 10 protein peptide tag (Lutz-Freyermuth et al. (1990) Proc. Natl. Acad. Sci. USA 87, 6393-6397].

[0325] In certain embodiments, the chimeric molecule can comprise a fusion of a non naturally occurring CKP protein described herein (such as a non-naturally occurring VEGF A-binding CKP or a non-naturally occurring LRP6-binding CKP) with an immunoglobulin or a particular region of an immunoglobulin. For a bivalent form of the chimeric molecule (e.g., an "immunoadhesin"), such a fusion could be to the Fc region of an IgG molecule. Ig fusions provided herein include polypeptides that comprise approximately or only residues 94-243, residues 33-53 or residues 33-52 of human in place of at least one variable region within an Ig molecule. In a particularly preferred embodiment, the immunoglobulin fusion includes the hinge, CH2 and CH3, or the hinge, CHI, CH2 and CH3 regions of an IgG Imolecule. For the production of immunoglobulin fusions see also, U.S. Patent No. 5,428,130 issued June 27, 1995. In certain embodiments, a non-naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) is fused, e.g., at the N or C terminus, to the constant region of an IgG (Fc). In certain embodiments, the non-naturally occurring CKP/Fc fusion molecule activates the complement component of the immune response. In certain embodiments, the non-naturally occurring CKP/Fc fusion protein increases the therapeutic value of the non-naturally occurring CKP. In certain embodiments, a non-naturally occurring CKP protein described herein (such as a non naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) is fused (such as recombinantly fused), e.g., at the N or C terminus, to a complement protein, such as Clq. Various publications describe methods for obtaining non-naturally occurring proteins whose half-lives are modified either by introducing an FcRn-binding polypeptide into the molecules (WO 1997/43316, US 5869046, US 5747035, WO 1996/32478, WO 1991/14438) or by fusing the proteins with antibodies whose FcRn-binding affinities are preserved but affinities for other Fc receptors have been greatly reduced (WO 1999/43713) or fusing with FcRn binding domains of antibodies (WO 2000/09560, US 4703039). Specific techniques and methods of increasing half-life of physiologically active molecules (e.g., non naturally occurring CKP) can also be found in US 7083784. In certain embodiments, a non naturally occurring CKP protein described herein (such as a non-naturally occurring VEGF A-binding CKP or a non-naturally occurring LRP6-binding CKP) is fused to an Fc region from an IgG that comprises amino acid residue mutations (as numbered by the EU index in Kabat): M252Y/S254T/T256E or H433K/N434F/Y436H.

[0326] In certain embodiments, non-naturally occurring CKP proteins described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6 binding CKP) are fused with molecules that increase or extend in vivo or serum half-life. In certain embodiments, a non-naturally occurring CKP described herein (such as a non naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) is fused with albumin, such as human serum albumin (HSA), polyethylene glycol (PEG), polysaccharides, immunoglobulin molecules (IgG), complement, hemoglobin, a binding peptide, lipoproteins or other factors to increase its half-life in the bloodstream and/or its tissue penetration.

[03271 Additional chimeric molecules comprising non-naturally occurring VEGF-A binding CKPs or non-naturally occurring LRP6-binding CKPs may be generated through the techniques of gene-shuffling, motif-shuffling, exon-shuffling, and/or codon-shuffling (collectively referred to as "DNA shuffling"). DNA shuffling may be employed to alter the activities of the non-naturally occurring CKPs (e.g., non-naturally occurring CKPs with higher affinities and lower dissociation rates). See, generally, US 5605793, US5811238, US 5830721, US 5834252, US 5837458, Patten et al. (1997) Curr. Opinion Biotechnol. 8, 724 33; Harayama (1998) Trends Biotechnol. 16, 76-82; Hansson, et al., (1999) J Mol. Biol. 287, 265-76; and Lorenzo and Blasco, (1998) Biotechniques 24, 308-313

[0328] In certain embodiments, a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP provided herein is altered by being subjected to random mutagenesis by error-prone PCR, random nucleotide insertion or other methods prior to recombination. One or more portions of a polynucleotide encoding a scaffold that binds to a specific target may be recombined with one or more components, motifs, sections, parts, domains, fragments, etc. of one or more heterologous molecules.

[0329] Any of these fusions can generated by standard techniques, for example, by expression of the fusion protein from a recombinant fusion gene constructed using publicly available gene sequences, or by chemical peptide synthesis.

Conjugates Comprising a Non-Naturally Occurring VEGF-A-Binding CKP or a Non Naturally Occurring LRP6-binding CKP)

[0330] Provided herein are immunoconjugates comprising a non-naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non naturally occurring LRP6-binding CKP) conjugated to a cytotoxic agent such as a chemotherapeutic agent, toxin (e.g., an enzymatically active toxin of bacterial, fungal, plant, or animal origin, or fragments thereof), or a radioactive isotope (i.e., a radioconjugate).

[0331] Enzymatically active toxins and fragments thereof that can be used include diphtheria A chain, nonbinding active fragments of diphtheria toxin, exotoxin A chain (from Pseudomonas aeruginosa), ricin A chain, abrin A chain, modeccin A chain, alpha-sarcin, Aleuritesfordiiproteins, dianthin proteins, Phytolaca americanaproteins (PAPI, PAPII, and PAP-S), Momordica charantiainhibitor, curcin, crotin, Saponariaofficinalis inhibitor, gelonin, mitogellin, restrictocin, phenomycin, enomycin, and the tricothecenes. Other toxins include maytansine and maytansinoids, calicheamicin and other cytotoxic agents. A variety of radionuclides are available for the production of radioconjugated non-naturally occurring CKPs. Examples include 2 12 Bi, 131 131 n, 90Y, and 186Re.

[0332] Conjugates of a non-naturally occurring CKP described herein (such as a non naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) and, e.g., cytotoxic agent, are made using a variety of bifunctional protein-coupling agents such as N-succinimidyl-3-(2-pyridyldithiol) propionate (SPDP), iminothiolane (IT), bifunctional derivatives of imidoesters (such as dimethyl adipimidate HCl), active esters (such as disuccinimidyl suberate), aldehydes (such as glutaraldehyde), bis-azido compounds (such as bis (p-azidobenzoyl) hexanediamine), bisdiazonium derivatives (such as bis-(p diazoniumbenzoyl)-ethylenediamine ), diisocyanates (such as tolyene 2,6-diisocyanate), and bis-active fluorine compounds (such as 1,5-difluoro-2,4-dinitrobenzene). For example, a ricin immunotoxin can be prepared as described in Vitetta et al., Science, 238: 1098 (1987). Carbon-14-labeled 1-isothiocyanatobenzyl-3-methyldiethylene triaminepentaacetic acid (MX-DTPA) is an exemplary chelating agent for conjugation of radionuclide to a non naturally occurring CKP provided herein. See, W094/11026.

[0333] In another embodiment, the non-naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6 binding CKP) can be conjugated to a "receptor" (such as streptavidin) for utilization in ocular "pre-targeting" wherein the non-naturally occurring EETI-II scaffold protein-receptor conjugate is administered to the eye patient, followed by removal of unbound conjugate from the circulation using a clearing agent and then administration of a "ligand" (e.g., avidin) that is conjugated to a cytotoxic agent (e.g., a radionuclide) or a therapeutic agent.

[0334] In certain embodiments, the non-naturally occurring CKPs provided herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6 binding CKP) can be used as bi- or multi-specific (for different target ligands or different epitopes on the same target ligand) in multimer form. The attachments may be covalent or non-covalent. For example, a dimeric bispecific non-naturally occurring CKP has one subunit with specificity for a first target protein or epitope and a second subunit with specificity for a second target protein or epitope. Non-naturally occurring CKP subunits can be joined, e.g., via conjugation, in a variety of conformations that can increase the valency and thus the avidity of binding to a target ligand or to bind multiple target ligands.

[0335] In certain embodiments, non-naturally occurring CKPs provided herein are engineered to provide reactive groups for conjugation. In certain embodiments, the N terminus and/or C- terminus may also serve to provide reactive groups for conjugation. In certain embodiments, the N- terminus is conjugated to one moiety (such as, but not limited to PEG) while the C-terminus is conjugated to another moiety (such as, but not limited to biotin), or vice versa.

[0336] Provided is a non-naturally occurring CKP described herein (such as a non naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) conjugated to one or more moieties, including but not limited to, peptides, polypeptides, proteins, fusion proteins, nucleic acid molecules, small molecules, mimetic agents, synthetic drugs, inorganic molecules, and organic molecules. Also provided is the use of a non naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A binding CKP or a non-naturally occurring LRP6-binding CKP) chemically conjugated (including both covalent and non-covalent conjugations) to a heterologous protein or polypeptide (or fragment thereof, to a polypeptide of at least 10, at least 20, at least 30, at least 40, at least 50, at least 60, at least 70, at least 80, at least 90 or at least 100 amino acids). The fusion does not necessarily need to be direct, but may occur through linker sequences described herein.

[03371 In certain embodiments, a non-naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP), or analogs or derivatives thereof may be conjugated to a diagnostic or detectable agent. Such non-naturally occurring CKP conjugates can be useful for monitoring or prognosing the development or progression of a disease as part of a clinical testing procedure, such as determining the efficacy of a particular therapy. Such diagnosis and detection can be accomplished by coupling the non-naturally occurring CKP to detectable substances including, but not limited to various enzymes, such as but not limited to horseradish peroxidase, alkaline phosphatase, beta-galactosidase, or acetylcholinesterase; prosthetic groups, such as but not limited to streptavidinbiotin and avidin/biotin; fluorescent materials, such as but not limited to, umbelliferone, fluorescein, fluorescein isothiocynate, rhodamine, dichlorotriazinylamine fluorescein, dansyl chloride or phycoerythrin; luminescent materials, such as, but not limited to, luminol; bioluminescent materials, such as but not limited to, luciferase, luciferin, and aequorin; radioactive materials, such as but not limited to iodine

1251 1231 1211), 5 3 11 carbon ( 14C), sulfur 3( S), tritium( H), indium ( 5 In, 113 n, 112 n, 11 1 n,), (1311

and technetium (9 9Tc), thallium ( 2 0 iTi), gallium ( 68Ga, 67 Ga), palladium ( 10 3 Pd), molybdenum ( 99Mo), xenon ( 133Xe), fluorine ( 18F), 153Sm, 17 7Lu, 59 1 Gd, 14 9Pm, 14 La, 17 5Yb, 166 Ho, 90 Y, 4 7 Sc, 18 6Re, 188Re, 142Pr , Rh , 9 7Ru, 68Ge , 57Co , 6 5Zn, 85 Sr, p , 153Gd, 169Yb , 5 1Cr , 54Mn 32

75 1 13 117 Se, Sn, and Tn; positron emitting metals using various positron emission tomographies, nonradioactive paramagnetic metal ions, and molecules that are radiolabeled or conjugated to specific radioisotopes.

[0338] Also provided is a non-naturally occurring CKPs (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) conjugated to a therapeutic moiety. In certain embodiments, a non-naturally occurring CKP may be conjugated to a therapeutic moiety such as a cytotoxin, e.g., a cytostatic or cytocidal agent, a therapeutic agent or a radioactive metal ion, e.g., alpha-emitters. A cytotoxin or cytotoxic agent includes any agent that is detrimental to cells.

[0339] In certain embodiments, a non-naturally occurring CKP described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP is conjugated to therapeutic moieties such as a radioactive metal ion, such as alpha 2 13 emitters such as Bi or macrocyclic chelators useful for conjugating radiometal ions, including but not limited to, 13 n, 13 Lu, 13 1 , 13 1Ho, 13 1Sm, to polypeptides. In certain

embodiments, the macrocyclic chelator is 1, 4, 7, 10- tetraazacyclododecane-N,N',N",N"' tetra-acetic acid (DOTA) which can be attached to the non-naturally occurring CKP via a linker molecule. Such linker molecules are commonly known in the art and described in, e.g., Denardo et al. (1998) Clin CancerRes. 4, 2483-90; Peterson et al. (1999) Bioconjug. Chem. 10, 553-557; and Zimmerman et al. (1999) Nucl. Med. Biol. 26, 943-50.

[03401 Techniques for conjugating therapeutic moieties to antibodies are well known and can be applied to the non-naturally CKPs disclosed herein, see, e.g., Amon et al., "Monoclonal Antibodies For Immunotargeting Of Drugs In Cancer Therapy," in Monoclonal Antibodies And Cancer Therapy, Reisfeld et al. (eds.), pp. 243-56. (Alan R. Liss, Inc. 1985); Hellstrom et al., "Antibodies For Drug Delivery", in Controlled Drug Delivery (2nd Ed.), Robinson et al. (eds.), pp. 623-53 (Marcel Dekker, Inc. 1987); Thorpe, "Antibody Carriers Of Cytotoxic Agents In Cancer Therapy: A Review", in Monoclonal Antibodies 84: Biological And Clinical Applications, Pinchera et al. (eds.), pp. 475-506 (1985); "Analysis, Results, And Future Prospective Of The Therapeutic Use Of Radio labeled Antibody In Cancer Therapy", in Monoclonal Antibodies For Cancer Detection And Therapy, Baldwin et al. (eds.), pp. 303 16 (Academic Press 1985), and Thorpe et al., 1982, Immunol. Rev. 62:119-58. Similar approaches may be adapted for use with the non-naturally occurring CKPs provided herein.

[0341] The therapeutic moiety or drug conjugated to a non-naturally CKP described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) should be chosen to achieve the desired prophylactic or therapeutic effect(s) for a particular disorder in a subject. A clinician or other medical personnel should consider the following when deciding on which therapeutic moiety or drug to conjugate to a scaffold: the nature of the disease, the severity of the disease, and the condition of the subject.

[0342] In certain embodiments, non-naturally occurring CKPs described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) can also be attached to solid supports, which are particularly useful for immunoassays or purification of the target antigen. Such solid supports include, but are not limited to, glass, cellulose, polyacrylamide, nylon, polystyrene, polyvinyl chloride or polypropylene.

Covalent Modifications

[0343] Covalent modifications of non-naturally occurring CKPs described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6 binding CKP) are also contemplated. One type of covalent modification includes reacting targeted amino acid residues of a non-naturally occurring CKP with an organic derivatizing agent that is capable of reacting with selected side chains or the N- or C- terminal residues of the non-naturally occurring CKP. Derivatization with bifunctional agents is useful, for instance, for crosslinking the non-naturally occurring CKP to a water-insoluble support matrix or surface for use in the method for purifying a target ligand, and vice-versa.

Commonly used crosslinking agents include, e.g., 1,1-bis(diazoacetyl)-2-phenylethane, glutaraldehyde, N-hydroxysuccinimide esters, for example, esters with 4-azidosalicylic acid, homobifunctional imidoesters, including disuccinimidyl esters such as 3,3' dithiobis(succinimidyl-propionate), bifunctional maleimides such as bis-N-maleimido-1,8 octane and agents such as methyl-3-[(p-azidophenyl)-dithio]propioimidate.

[0344] Other modifications include deamidation of glutaminyl and asparaginyl residues to the corresponding glutamyl and aspartyl residues, respectively, hydroxylation of proline and lysine, phosphorylation of hydroxyl groups of seryl or threonyl residues, methylation of the a-amino groups of lysine, arginine, and histidine side chains (T.E. Creighton, Proteins: Structure and Molecular Properties, W.H. Freeman & Co., San Francisco, pp. 79-86 (1983)), acetylation of the N-terminal amine, and amidation of any C-terminal carboxyl group.

[0345] Another type of covalent modification of a non-naturally occurring CKP comprises linking the non-naturally occurring CKP to one of a variety of nonproteinaceous polymers, e.g., polyethylene glycol (PEG), polypropylene glycol, or polyoxyalkylenes, in the manner set forth in US 4640835, US 4496689, US 4301144, US 4670417, US 4791192 or US 4179337

[0346] The term "polyethylene glycol" or "PEG" means a polyethylene glycol compound or a derivative thereof, with or without coupling agents, coupling or activating moieties (e.g., with thiol, triflate, tresylate, azirdine, oxirane, N-hydroxysuccinimide or a maleimide moiety). The term "PEG" is intended to indicate polyethylene glycol of a molecular weight between 500 and 150,000 Da, including analogues thereof, wherein for instance the terminal OR-group has been replaced by a methoxy group (referred to as mPEG).

[03471 In certain embodiments, non-naturally occurring CKPs described herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) are derivatized with polyethylene glycol (PEG). PEG is a linear, water-soluble polymer of ethylene oxide repeating units with two terminal hydroxyl groups. PEGs are classified by their molecular weights which typically range from about 500 daltons to about ,000 daltons. In a presently preferred embodiment, the PEGs employed have molecular weights ranging from 5,000 daltons to about 20,000 daltons. PEGs coupled to the non naturally occurring CKPs described herein can be either branched or unbranched (for example, Monfardini, C. et al. 1995 Bioconjugate Chem 6:62-69). PEGs are commercially available from Nektar Inc., Sigma Chemical Co. and other companies. Such PEGs include, but are not limited to, monomethoxypolyethylene glycol (MePEG-OH), monomethoxypolyethylene glycol-succinate (MePEG-S), monomethoxypolyethylene glycol succinimidyl succinate (MePEG-S-NHS), monomethoxypolyethylene glycol-amine (MePEG NH2), monomethoxypolyethylene glycol-tresylate (MePEG-TRES), and monomethoxypolyethylene glycol-imidazolyl-carbonyl (MePEG-IM).

[03481 In certain embodiments, the hydrophilic polymer which is employed, for example, PEG, is capped at one end by an unreactive group such as a methoxy or ethoxy group. Thereafter, the polymer is activated at the other end by reaction with a suitable activating agent, such as cyanuric halides (for example, cyanuric chloride, bromide or fluoride), diimadozle, an anhydride reagent (for example, a dihalosuccinic anhydride, such as dibromosuccinic anhydride), acyl azide, p-diazoiumbenzyl ether, 3-(p-diazoniumphenoxy)-2 hydroxypropylether) and the like. The activated polymer is then reacted with a non-naturally occurring CKP herein (such as a non-naturally occurring VEGF-A-binding CKP or a non naturally occurring LRP6-binding CKP) to produce a non-naturally occurring CKP derivatized with a polymer. Alternatively, a functional group in the non-naturally occurring CKP provided herein can be activated for reaction with the polymer, or the two groups can be joined in a concerted coupling reaction using known coupling methods. It will be readily appreciated that the non-naturally occurring CKPs provided herein can be derivatized with PEG using a myriad of other reaction schemes known to and used by those of skill in the art.

Liposomes

[0349] Non-naturally occurring CKPs disclosed herein (such as a non-naturally occurring VEGF-A-binding CKP or a non-naturally occurring LRP6-binding CKP) can also be formulated as liposomes. Liposomes containing a non-naturally occurring EETI-II scaffold protein described herein can be prepared by methods known in the art, such as described in Epstein et al., Proc Natl Acad Sci USA, 82: 3688 (1985); Hwang et al., Proc Natl Acad Sci USA, 77: 4030 (1980); and U.S. Pat. Nos. 4,485,045 and 4,544,545. Liposomes with enhanced circulation time are disclosed in U.S. Patent No. 5,013,556.

[0350] Particularly useful liposomes can be generated by the reverse-phase evaporation method with a lipid composition comprising phosphatidylcholine, cholesterol, and PEG derivatized phosphatidylethanolamine (PEG-PE). Liposomes are extruded through filters of defined pore size to yield liposomes with the desired diameter. A second therapeutic agent is optionally also contained within the liposome. See, Gabizon et al., J. National Cancer Inst., 81(19): 1484 (1989). Pharmaceutical Compositions and Formulations Comprising Non

Naturally Cystine Knot Peptides (CKPs) That Bind Human Vascular Endothelial Growth Factor A(VEGF-A)

[0351] In certain embodiments, provided herein is a pharmaceutical composition comprising a non-naturally occurring VEGF-A-binding CKP and a pharmaceutically acceptable excipient. In certain embodiments the composition may also contain, buffers, carriers, stabilizers, preservatives and/or bulking agents, to render the composition suitable for ocular administration to a patient to achieve a desired effect or result. In certain embodiments, the pharmaceutical composition comprises one or more permeability enhancers that permit a non-naturally occurring VEGF-A-binding CKP to penetrate the cornea. Examples of such permeability enhancers include, e.g., surfactants, bile acids, chelating agents, preservatives, cyclodextrins (i.e., cylindrical oligonucleotides with a hydrophilic outer surface and a lipophilic inner surface that form complexes with lipophilic drugs), etc. Such permeability enhancers increase chemical stability and bioavailability and decrease local irritation. In certain embodiments, a pharmaceutical composition provided herein additionally comprises agents that increase the absorption and distribution of non-naturally occurring VEGF-A-binding CKP in various ocular compartments. In certain embodiments, a pharmaceutical composition provided herein comprises a cross-linked polyacrylic acid, which can enhance ocular bioavailability by virtue of its mucoadhesive properties. In certain embodiments, a pharmaceutical composition provided herein comprises a bioadhesive polymer.

[0352] In certain embodiments, a pharmaceutical composition provided herein is formulated as an in-situ gelling system, e.g., a viscous polymer-based liquid that exhibits sol to-gel phase transition on the ocular surface due to change in a specific physicochemical parameter (ionic strength, temperature, pH, or solvent exchange) when the composition comes into contact with tear fluid. In certain embodiments, a pharmaceutical composition provided herein is formulated as an eye spray. In certain embodiments, a pharmaceutical composition provided is formulated as liposomes. In certain embodiments, a pharmaceutical composition provided herein is formulated as niosomes (i.e., non-ionic surfactant-based vesicles containing, e.g., cholesterol as an excipient). In certain embodiments, a pharmaceutical composition provided herein is formulated as pharmacosomes (i.e., vesicles formed by amphiphilic drugs). In certain embodiments, a pharmaceutical composition provided herein is formulated as a microemulsion. Further details regarding various ophthalmic pharmaceutical formulations are provided in, e.g., Gaikwad et al. (2013) Indo Amer JPharmRes. 3, 3216-3232; Achouri et al. (2012) DrugDev Indust Pharm. 39, 1599

114 17800220_1 (GHMaters) P108077.AU.1

1617; Lu (2010) Recent PatDrug Deliv Formul. 4, 49-57; Baranowski et al. (2014) Sci World J. doi.org/10.1155/2014/861904; Lang (1995) Adv DrugDeliv Rev. 16, 39-43; Short (2008) Toxicologic Path. 36, 49-62; and others.

[0353] In certain embodiments, a pharmaceutical composition comprising non-naturally occurring VEGF-A-binding CKP described herein is stable at room temperature (such as at about 20-25°C) for about 0.5 weeks, about 1.0 weeks, about 1.5 weeks, about 2.0 weeks, about 2.5 weeks, 3.5 weeks, about 4.0 weeks, about 1 month, about 2 months about 3 months, about 4 months about 5 months, about 6 months, or greater than 6 months, including any range in between these values. In certain embodiments, a pharmaceutical composition comprising non-naturally occurring VEGF-A-binding CKP described herein is stable under accelerated conditions (such as storage at about 37C) for about 0.5 weeks, about 1.0 weeks, about 1.5 weeks, about 2.0 weeks, about 2.5 weeks, 3.5 weeks, about 4.0 weeks, about 1 month, about 2 months about 3 months, about 4 months about 5 months, about 6 months, or greater than 6 months, including any range in between these values.

Methods of Treatment Using Non-Naturally Occurring Cystine Knot Peptides (CKPs) That Bind Vascular Endothelial Growth Factor A (VEGF-A)

[0354] Vascular endothelial growth factor (VEGF-A), a dimeric glycoprotein of approximately 40 kDa, is a potent, endothelial cell mitogen that stimulates proliferation, migration and tube formation leading to angiogenic growth of new blood vessels and increased vascular permeability. Low oxygen conditions in the retina or cornea induce the expression of vascular endothelial growth factor (VEGF-A), and the abnormal (such as excessive or otherwise inappropriate) growth of leaky blood vessels contributes to the pathology of several debilitating ocular diseases including, e.g., diabetic blindness, retinopathies, primarily diabetic retinopathy, age-related macular degeneration (AMD), proliferative diabetic retinopathy (PDR), retinopathy of prematurity (ROP), choroidal neovascularization (CNV), diabetic macular edema, pathological myopia, von Rippel-Lindau disease, histoplasmosis of the eye, retinal vein occlusion (both branched retinal vein occlusion (BRVO) and central retinal vein occlusion (CRVO), corneal neovascularization, retinal neovascularization and rubeosis. The VEGF-A-induced formation of new blood vessels is detrimental, and retinal, intertrabecular or corneal neovascularization can ultimately lead to vision loss.

115 17800220_1 (GHMaters) P108077.AU.1

[03551 In certain embodiments, provided herein is a method of treating an ocular disease or disorder in a subject comprising administering to the subject an effective amount of a non naturally occurring VEGF-A-binding CKP described herein or a composition (such as a pharmaceutical composition) comprising a non-naturally occurring VEGF-A-binding CKP described herein. In certain embodiment, provided are compositions (such as pharmaceutical compositions) comprising a non-naturally occurring VEGF-A-binding CKP described herein for use in treating an ocular disease or disorder in a subject. In certain embodiments, provided is the use of a non-naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally occurring CKP) in the manufacture of a medicament for the treatment of an ocular disease or disorder in a subject.

[03561 In certain embodiments, the subject to be treated is a mammal (e.g., human, non human primate, rat, mouse, cow, horse, pig, sheep, goat, dog, cat, etc.). In certain embodiments, the subject is a human. In certain embodiments, the subject is a clinical patient, a clinical trial volunteer, an experimental animal, etc. In certain embodiments, the subject is suspected of having or at risk for having an ocular disease or disorder characterized by abnormal angiogenesis and/or abnormal vascular permeability (such as those described herein). In certain embodiments, the subject has been diagnosed with an ocular disease or disorder characterized by abnormal angiogenesis and/or abnormal vascular permeability (such as those described herein).

[03571 In certain embodiments, the ocular disease or disorder is an ocular vascular proliferative disease, such as an ocular vascular proliferative disease selected from the group consisting of diabetic blindness, retinopathies, primarily diabetic retinopathy, age-related macular degeneration (AMD), proliferative diabetic retinopathy (PDR), retinopathy of prematurity (ROP), choroidal neovascularization (CNV), diabetic macular edema, pathological myopia, von Rippel-Lindau disease, histoplasmosis of the eye, retinal vein occlusion (both branched retinal vein occlusion (BRVO) and central retinal vein occlusion (CRVO), comeal neovascularization, retinal neovascularization, and rubeosis. In certain embodiments, the comeal neovascularization results infection of the eye, inflammation in the eye, trauma to the eye (including chemical bums), or loss of the limbal stem cell barrier. In certain embodiments, the comeal neovascularization results from herpetic keratitis, trachoma, or onchocerciasis.

[0358] In certain embodiments, the effective amount of the non-naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally

116 17800220_1 (GHMaters) P108077.AU.1 occurring VEGF-A-binding CKP described herein) is administered directly to the eye of the subject (such as intravitreally or topically), as described in further detail elsewhere herein.

[03591 In certain embodiments, the non-naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally occurring CKP) is administered in combination with a second agent. For patients in whom the ocular disease or disorder is triggered by an inflammatory response, combination therapy with an anti inflammatory agent can be considered. For example, the combined use of steroids and a non naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally CKP) to reduce inflammation and prevent formation of new blood vessels, respectively, may be particularly advantageous in patients with, e.g., corneal neovascularization. Patients who suffer from an ocular disease or disorder secondary to bacterial, viral, fungal or acanthamoebal infection may benefit from administration of a non naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally occurring CKP) in combination with an antimicrobial agent and optionally an anti-inflammatory agent. Patients with corneal stromal blood vessels as a result of an ocular disease or disorder are at a significant risk for immune rejection after comeal transplantation. Administration of a non-naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally occurring CKP) prior to (and optionally also subsequent to) comeal transplantation therefore may be particularly beneficial to patients with corneal stromal blood vessels as successful reduction of corneal vascularization will reduce the risk of graft rejection. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally occurring CKP) is administered in combination with a second anti-angiogenic agent. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally occurring CKP) is administered in combination with a matrix metalloprotease (MMP) inhibitor.

[0360] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP described herein (or composition comprising such non-naturally occurring CKP) is administered in combination with a second therapy. In certain embodiments, the second therapy is laser photocoagulation therapy (LPT). LPT uses laser light to cause controlled damage of the retina to produce a beneficial therapeutic effect. Small bursts of laser light can seal leaky blood vessels, destroy abnormal blood vessels, seal retinal tears, or destroy abnormal tissue in the back of the eye. It is quick, non-invasive, and usually requires no anesthesia other than an anesthetic eye drop. LPT techniques and apparatuses are readily available to ophthalmologists (see Lock et al. (2010) MedJMalaysia65:88-94). Additional details regarding LPT can be found in, e.g., WO 2014/033184.

[0361] In certain embodiments, the second therapy is photodynamic therapy (PDT). PDT uses a light-activated molecule to cause localized damage to neovascular endothelium, resulting in vessel occlusion. Light is delivered to the retina as a single circular spot via a fiber optic cable and a slit lamp, using a suitable ophthalmic magnification lens (laser treatment). The light-activated compound is injected into the circulation prior to the laser treatment, and damage is inflicted by photoactivation of the compound in the area afflicted by neovascularization. One commonly used light-activated compound is verteporfin (Visudyne@). Verteporfin is transported in the plasma primarily by lipoproteins. Once verteporfin is activated by light in the presence of oxygen, highly reactive, short-lived singlet oxygen and reactive oxygen radicals are generated which damages the endothelium surrounding blood vessels. Damaged endothelium is known to release procoagulant and vasoactive factors through the lipo-oxygenase (leukotriene) and cyclooxygenase (eicosanoids such as thromboxane) pathways, resulting in platelet aggregation, fibrin clot formation and vasoconstriction. Verteporfin appears to somewhat preferentially accumulate in neovasculature. The wavelength of the laser used for photoactivation of the light-activated compound may vary depending on the specific light-activated compound used. Additional details regarding PDT can be found in, e.g., WO 2014/033184.

[0362] In certain embodiments, the second therapy is diathermy and cautery, wherein vessels are occluded either by application of a coagulating current through a unipolar diathermy unit or by thermal cautery using an electrolysis needle inserted into feeder vessels at the limbus.

Administration

[0363] In certain embodiments the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is administered, e.g., via injection, e.g., subconjunctival injection, intracomeal injection, or intravitreal injection. Administration in aqueous form is usual, with a typical volume of 20-150 l e.g. 40-60 l, or

[1. Injection can be via a 30-gauge x 1/2-inch (12.7 mm) needle. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non naturally occurring CKP) is provided in a pre-filled sterile syringe ready for administration. In certain embodiments, the syringe has low silicone content or is silicone free. The syringe may be made of glass. Using a pre-filled syringe for delivery has the advantage that any contamination of the sterile antagonist solution prior to administration can be avoided. Pre filled syringes also provide easier handling for the administering ophthalmologist. See, e.g., WO 2014/033184, Fagan et al. (2013) Clin Exp Ophthalmol. 41, 500-507; Avery et al. (2014) Retina. 34 Suppl 12, S1-S18; and Doshi et al. (2015) Seminar Ophthalmol. 26, 104-113 for further details regarding intravitreal administration.

[0364] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is administered topically, e.g. in form of eye drops. Additional details regarding topical drug delivery to the eye are found in, e.g., Loftsson et al. (2012) Acta Ophthalmologica. 90, 603-608; Patel et al. (2013) World J. Pharmacol. 2, 47-64; Freeman et al. (2009) Exp Rev Ophthalmol. 4, 59-64; and Boddu et al. (2014) Recent Patents on Drug Delivery and Formulation. 8, 27-36.

[0365] In certain embodiments, an intravitreal device is used to continuously deliver the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non naturally occurring CKP) into the eye. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is administered via ocular insert (including, but not limited to, e.g., Ocuserts, Lactisers, Soluble Ocular Drug Inserts (SODIs), Minidiscs, contact lenses, films, filter paper strips, artificial tear inserts, and collagen shields). See, e.g., Gaikwad et al. (2013) Indo Amer JPharmRes. 3, 3216-3232). In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is administered as a slow-release depot, an ocular plug/reservoir, an ocular implant (such as a scleral or vitreal implant). Various scleral and intravitreal delivery systems are known in the art. These delivery systems are typically non-biodegradable, and may be active or passive. For example, WO 2010/088548 describes a delivery system having a rigid body using passive diffusion to deliver a therapeutic agent. WO 2002/100318 discloses a delivery system having a flexible body that allows active administration via a pressure differential. Alternatively, active delivery can be achieved by implantable miniature pumps. An example for an intravitreal delivery system using a miniature pump to deliver a therapeutic agent is the Ophthalmic MicroPump SystemTMmarketed by Replenish, Inc. which can be programmed to deliver a set amount of a therapeutic agent for a pre-determined number of times. In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non naturally occurring CKP) is encased in a small capsule-like container (e.g., a silicone elastomer cup). The container is usually implanted in the eye above the iris. The container comprises a release opening. Release of the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) may be controlled by a membrane positioned between the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) and the opening, or by means of a miniature pump connected to the container. Alternatively, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) may be deposited in a slow-release matrix that prevents rapid diffusion of the antagonist out of the container. Preferably, the intravitreal device is designed to release the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) at an initial rate that is higher in the first month. The release rate slowly decreases, e.g., over the course of the first month after implantation, to a rate that is about 50% less than the initial rate. The container may have a size that is sufficient to hold a supply of the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) that lasts for about four to six months. Since a reduced dose of the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) may be sufficient for effective treatment when administration is continuous, the supply in the container may last for one year or longer, preferably about two years, more preferably about three years. Because only a small surgery is required to implant a delivery system and intravitreal injections are avoided, patient compliance issues with repeated intravitreal injections can be avoided. Intravitreal concentrations of the non-naturally occurring VEGF A-binding CKP (or composition comprising such non-naturally occurring CKP) are reduced, and therefore the potential risk of side-effects from the non-naturally occurring VEGF-A binding CKP (or composition comprising such non-naturally occurring CKP) entering the circulation is decreased.

[0366] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is administered via iontophoresis. Iontophoresis is a noninvasive technique in which a small electric current is applied to enhance ionized drug penetration into tissue (see, e.g., Myles et al. (2005) Adv Drug Deliv Rev 57, 2063-79 and Eljarrat-Binstock et al. (2006) J ControlledRelease 110, 479-89). The drug is applied with an electrode carrying the same charge as the drug, and the ground electrode, which is of the opposite charge, is placed elsewhere on the body to complete the circuit. The drug serves as the conductor of the current through the tissue.

[03671 Additional details regarding administration of drug to the eye are provided in, e.g., Kuno et al. (2011) Polymers 3, 193-221; Short (2008) Toxicologic Path. 36, 49-62;

Ghateet al. (2006) Expert Opin Drug Deliv 3, 275-87; Davis et al. (2004) Curr Opin Mol Therap 6, 195-205; Gaudana et al. (2010) AAPSJ. 12, 348-360; and others.

Slow Release /Long Acting Delivery Formulations

[0368] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is provided as slow-release formulations. Slow-release formulations are typically obtained by mixing a therapeutic agent with a biodegradable polymer or encapsulating it into microparticles.

[0369] A slow-release formulation in accordance with the invention typically comprises the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non naturally occurring CKP), a polymeric carrier, and a release modifier for modifying a release rate of the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) from the polymeric carrier. By varying the manufacture conditions of polymer-based delivery compositions, the release kinetic properties of the resulting compositions can be modulated. The polymeric carrier usually comprises one or more biodegradable polymers or co-polymers or combinations thereof. For example, the polymeric carrier may be selected from poly-lactic acid (PLA), poly-glycolic acid (PGA), polylactide-co-glycolide (PLGA), polyesters, poly (orthoester), poly(phosphazine), poly (phosphate ester), polycaprolactones, or a combination thereof.

[03701 In certain embodiments the polymeric carrier is PLGA. The release modifier is typically a long chain fatty alcohol, preferably comprising from 10 to 40 carbon atoms. Commonly used release modifiers include capryl alcohol, pelargonic alcohol, capric alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, elaidyl alcohol, oleyl alcohol, linoleyl alcohol, polyunsaturated elaidolinoleyl alcohol, polyunsaturated linolenyl alcohol, elaidolinolenyl alcohol, polyunsaturated ricinoleyl alcohol, arachidyl alcohol, behenyl alcohol, erucyl alcohol, lignoceryl alcohol, ceryl alcohol, montanyl alcohol, cluytyl alcohol, myricyl alcohol, melissyl alcohol, and geddyl alcohol.

[03711 In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is incorporated into a microsphere-based sustained release composition. In certain embodiments, the microspheres are prepared from PLGA. The amount of the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) incorporated in the microspheres and the release rate of the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) can be controlled by varying the conditions used for preparing the microspheres. Processes for producing such slow-release formulations are described in US 2005/0281861 and US 2008/0107694.

[0372] In certain embodiments, the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) is incorporated into a biodegradable implant (such as a microneedle). Matrix implants (such as microneedles) are typically used to treat ocular diseases that require a loading dose followed by tapering doses of the drug during a 1-day to 6-month time period (Davis et al. (2004) Curr Opin Mol Therap 6, 195-205). They are most commonly made from the copolymers poly-lactic-acid (PLA) and/or poly-lactic-glycolic acid (PLGA), which degrade to water and carbon dioxide. The rate and extent of drug release from the implant can be decreased by altering the relative concentrations of lactide (slow) and glycolide (fast), altering the polymer weight ratios, adding additional coats of polymer, or using hydrophobic, insoluble drugs. The release of drug generally follows first-order kinetics with an initial burst of drug release followed by a rapid decline in drug levels. Biodegradable implants do not require removal, as they dissolve over time (Hsu (2007) Curr Opin Ophthalmol 18, 235-9). Biodegradable implants also allow flexibility in dose and treatment from short duration (weeks) to longer duration (months to a year), depending on the polymer PLA/PLGA ratio, which is another benefit in tailoring drug delivery to disease progression, because dose and treatment requirements may change over time. Additional details regarding the manufacture and implantation of biodegradable implants (such as PLGA or PLA implants) for the ocular administration are provided in, e.g., WO 2006/093758, US 2006/0182783, WO 2009/026461, US 2008/0181929, US 2009/0263460, US 2010/0015158, US 2011/0207653, and US 2014/0154321. Additional details regarding microneedles for ocular drug delivery are provided in, e.g., Donnelly et al. (2010) DrugDeliv 14, 187-207; USP7918814, Yavux et al. (2013) Sci World J. doi.org/10.1155/2013/732340, and elsewhere.

Articles of Manufacture and Kits

[0373] In certain embodiments, provided is an article of manufacture containing a non naturally occurring VEGF-A-binding CKP described herein and materials useful for the treatment of an ocular disease or disorder (such as an ocular vascular proliferative disease or ocular disorder characterized by excessive angiogenesis). The article of manufacture can comprise a container and a label or package insert on or associated with the container.

122 17800220_1 (GHMaters) P108077.AU.1

Suitable containers include, for example, bottles, vials, syringes, etc. The containers may be formed from a variety of materials such as glass or plastic. In certain embodiments, the container holds a composition which is effective for treating the ocular disease or disorder (such as an ocular vascular proliferative disease or ocular disorder characterized by excessive angiogenesis) and may have a complete set of items needed to implant a slow release ocular or intraocular drug delivery system, including, but not limited to, injection devices, topical and injectable medications, surgical instruments, sutures and suturing needles, and eye covers. In certain embodiments, the container fold sterile unit-dose packages. At least one active agent in the composition is non-naturally occurring VEGF-A-binding CKP described herein. The label or package insert indicates that the composition is used for treating an ocular disease or disorder (such as an ocular vascular proliferative disease or ocular disorder characterized by excessive angiogenesis). The label or package insert will further comprise instructions for administering the non-naturally occurring VEGF-A-binding CKP (or composition comprising such non-naturally occurring CKP) to the patient. Articles of manufacture and kits comprising combinatorial therapies described herein are also contemplated.

[03741 Package insert refers to instructions customarily included in commercial packages of therapeutic products that contain information about the indications, usage, dosage, administration, contraindications and/or warnings concerning the use of such therapeutic products. In certain embodiments, the package insert indicates that the composition comprising the non-naturally occurring VEGF-A-binding CKP is used for treating an ocular disease or disorder (such as an ocular vascular proliferative disease or ocular disorder characterized by excessive angiogenesis described herein).

[0375] Kits are also provided that are useful for various purposes, e.g., for isolation or detection VEGF-A, optionally in combination with the articles of manufacture. For isolation and purification of VEGF-A, the kit can contain non-naturally occurring VEGF-A-binding CKP described herein coupled to beads (e.g., sepharose beads). Kits can be provided which contain the non-naturally occurring VEGF-A-binding CKP described herein for detection and quantitation of VEGF-A in vitro, e.g. in an ELISA or blot. As with the article of manufacture, the kit comprises a container and a label or package insert on or associated with the container. For example, the container holds a composition comprising at least one non naturally occurring VEGF-A-binding CKP described herein. Additional containers may be included that contain, e.g., diluents and buffers, control antibodies, etc. The label or package

123 17800220_1 (GHMatters) P108077.AU.1 insert may provide a description of the composition as well as instructions for the intended in vitro or diagnostic use. EXAMPLES

Example 1: Materialsand Methodsfor Examples 2-3 Display of EETI-H on M13 phage.

[0376] EETI-II was displayed on the surface of M13 bacteriophage by modifying a previously described phagemid pS2202b (Skelton, N. J., Koehler, M. F., Zobel, K., Wong, W. L., Yeh, S., Pisabarro, M. T., Yin, J. P., Lasky, L. A., and Sidhu, S. S. (2003) Origins of PDZ domain ligand specificity. Structure determination and mutagenesis of the Erbin PDZ domain. JBiol Chem 278, 7645-7654). Standard molecular biology techniques were used to replace the fragment of pS2202d encoding Erbin PDZ domain with a DNA fragment encoding for EETI-II. The resulting phagemid (p8EETI-II) contained an open reading frame that encoded for the maltose binding protein secretion signal, followed by a gD tag and EETI II and ending with M13 major coat protein p8. E. Coli harboring p8EETI-II were co-infected with M13-K07 helper phage and cultures were grown in 30 ml 2YT medium supplemented with 50 pg/ml Carbenecillin and 25 pg/ml Kanamycin at 30 °C overnight. The propagated phage was purified according to the standard protocol (Tonikian, R., Zhang, Y., Boone, C., and Sidhu, S. S. (2007) Identifying specificity profiles for peptide recognition modules from phage-displayed peptide libraries. Nat Protoc 2, 1368-1386) and re-suspended in 1 ml PBT buffer (PBS, 0.5% BSA and 0.1% TWEEN@20), resulting in the production of phage particles that encapsulated p8EETI-II DNA and displayed EETI-II. The display level was analyzed using a phage ELISA.

Library Construction and Sorting.

[03771 The EETI-II libraries were constructed following Kunkel mutagenesis method (Kunkel, T. A., Roberts, J. D., and Zakour, R. A. (1987) Rapid and efficient site-specific mutagenesis without phenotypic selection. Methods Enzymol 154, 367-382). Three libraries were constructed: Library 1, in which loop 1 (3-8) was randomized with the degenerated codon encoding all natural amino acids except Cys at 6, 8 or 10 amino acids in length; or Library 2, in which loop 5 (22-26) was randomized with the same set of degenerated codon with fixed length of 5 amino acids; or Library 3, in which both loop 1 were randomized with 6, 8, and 10 amino acids and loop 5 with 5 amino acids simultaneously with degenerated codon encoding for 19 amino acids. Oligonucleotides for mutagenesis were synthesized using custom mixes of trimer phosphoramidites encoding for 19 amino acids at equimolar concentration. (Glen Research, Sterling, VA). The stop template is the single strand DNA of p8EETI-II containing three stop codons in region of 3-26 and was used to construct all three libraries. The pool of three libraries contained -3 x 100unique members and was cycled through rounds of binding selection against hVEGF (8-109) captured on plate for four rounds following the standard protocol (Tonikian, R., Zhang, Y., Boone, C., and Sidhu, S. S. (2007) Identifying specificity profiles for peptide recognition modules from phage-displayed peptide libraries. Nat Protoc 2, 1368-1386) with the variation that, 25ug/ml of hVEGF(8-109) was used to coat the plate and eluted phage were propagated by growing the overnight culture at 300C.

Spot Phage ELISA.

[0378] After four rounds of binding selection, individual phage clones were picked and inoculated into 450pl 2YT media containing 50pg/ml Carbenecillin and M13-KO7 helper

phage in 96-well blocks, which were grown at 37C overnight. The supernatant was analyzed with spot phage ELISA as follows: hVEGF(8-109) or BSA were coated on 384-well MAXISORP TM immunoplates and phage supernatant diluted (1:3) with PBT buffer was added to the wells. The plates were washed and bound phage was detected with anti-M13 HRP followed by TMB substrate. In these assays, phage binding to BSA alone was tested in parallel to assess background binding. Clones whose binding signals for hVEGF-A (8-109) were more than 3 times higher than to BSA (background) were considered positive. Positive clones were subjected to DNA sequence analysis.

Crystallography.

[03791 To form a stable complex, VEGF-A was concentrated to 7 mg/ml and incubated with a 6-fold molar excess of VEGF_CKP9.54.90 variant. VEGFA/ VEGF_CKP9.54.90 crystals of the primitive monoclinic space group P1211 were grown at 190 C by the hanging drop vapor diffusion method using a drop ratio of 2:1 protein: reservoir solution. Reservoir solution contained 100 mM HEPES pH 7.4 and 26% PEG 3350. Crystals were cryoprotected in reservoir solution supplemented with 25% PEG 200 and flash-frozen in liquid nitrogen prior to data collection.

Data Collection and Structure Determination.

[03801 X-ray diffraction data were collected to 1.64 A at beamline 211DF at the Advanced Photon Source. Data were processed using iMosfim. The structure was solved by molecular replacement using Phaser in Phenix with the previously published apo VEGF-A structure (PDB: 1VPF) as a search model and one VEGF-A dimer in the asymmetric unit. Clear F. - Fe density was present for the VEGFCKP9.54.90 variant, so the structure of this variant was built into the density manually using Coot and then subjected to iterative rounds of refinement and rebuilding using Phenix and Coot.

KDR-CHO VEGF Assay to Determine CellularICso

[03811 KDR-CHO cells (CHO cells stably transfected with gD tagged-KDR) were grown in cell growth medium (DMEM/Ham's F-12, 10% diafiltered FBS (GIBCO catalog no. TM). For VEGF stimulation assay, 5x10 4 26400),25 mM HEPES, 2 mM L-GLUTAMAX cells/well were plated in 100 pIl of cell plating medium (DMEM/Ham's F-12, 0.2% BSA, 0.25% diafiltered FBS, 25 mM HEPES, 2 mM L-GLUTAMAX TM) in 96-well tissue culture plate and incubated at 37°C overnight. The medium was replaced with 100 Pl of serum-free cell stimulation medium (DMEM/Ham's F-12,0.5% BSA, 25 mM HEPES) and cells were incubated at 37°C for 2 hr. One hour before stimulation, the medium was replaced with 50 Pl of serum-free cell stimulation medium. Concurrently, VEGF (50 ng/ml for hVEGF, 100 ng/ml for mVEGF and rVEGF) was pre-incubated with titrated amount of CKP or anti-VEGF in 50 pl of serum-free cell stimulation medium at 37°C for 1 hour and added to the cells. The cells were stimulated for 15 min at 37C and the medium is removed. The cells were lysed with 130 pIl of ice-cold cell lysis buffer (150 mM NaCl, 50 mM HEPES, 0.5% Triton-X 100, HALT protease and phosphatase inhibitor cocktail (ThermoFisher Scientific, Inc.catalog no. 78444), 5 mM EDTA). VEGF mediated Tyr phosphorylation of KDR was determined by ELISA-based assay. Briefly, MAXISORP TM 96 well plates (ThermoFisher Scientific, Inc. catalog no. 439454) were coated with 100 pl of anti-gD antibody diluted in PBS (1 pg/ml) at 4°C overnight and washed three times with washing buffer (PBS, 0.05% TWEEN@20, pH 7.4). The plates were blocked with 300 pl of blocking buffer (PBS, 0.5% BSA) at room temperature for 1 hour followed by washing three times with washing buffer. The above KDR-CHO cell lysate (100 pIl) was added to each well and incubated at room temperature for 2 hours. The plates were washed four times with washing buffer followed by incubation with 100 pl of 0.5 pg/ml biotin-conjugated anti-phosphotyrosine (clone 4G10, Millipore catalog no. 16-103) in blocking buffer at room temperature for 2 hours. After washing four times, the plates were incubated with 100 pIl of HRP-conjugated streptavidin in blocking buffer at room temperature for 30 min. After washing four times, the plates were developed with 100 pl of TMB substrate (BD Biosciences) at room temperature for 2030 min and stopped by addition of 50 pl of H2SO4 solution. The optical density of each well was determined using a microplate reader set to 450 nm.

Competition ELISAs

[0382] Binding specificity of each peptide was established by competition ELISA. First, binding of each growth factor to their corresponding receptor in a plate-ELISA format was confirmed by coating VEGF-A, VEGF-B, VEGF-C, VEGF-D, PlGf-2, NGF, EGF, PDGF pp, or IGF-1 at 2 or 5 pg/mL in MAXISORP TM plates overnight at 4°C in PBS. After blocking with block buffer (PBS with 0.5% BSA and 0.05% TWEEN@20) for 2 hours at room temperature, the receptor-Fc fusions or biotinylated receptors were serially diluted using assay buffer (PBS with 0.5% BSA and 0.05% TWEEN@20) and incubated for 1 hour at room temperature. Amount of bound receptor-Fc or biotinylated receptor was detected by incubating with anti-human-Fc-HRP (Life Technologies) or high affinity streptavidin-HRP (ThermoFisher Scientific, Inc.) respectively for 30 min. Competition ELISA was conducted in an identical fashion as described above except after blocking, a mixture of serially diluted peptide containing a constant concentration of receptor-Fc fusion or biotinylated receptor (concentration of receptor was set to EC6a) was added and incubated for 1 hour. All recombinant human proteins and antibodies were purchased from R &D Systems (Minneapolis, MN).

SPR Binding Assays.

[0383] Binding kinetics and affinities of inhibitors of VEGF-A were assessed using surface plasmon resonance technology on a BIACORETM 3000 instrument (GE Healthcare) at 37°C using HBS-EP buffer (10 mM HEPES pH 7.4,150 mM NaCl, 3 mM EDTA and 0.005%v/v surfactantP20) containing 0.1% DMSO (v/v). Depending on the format of the assay either a streptavidin sensor (SA) or a dextran-coated (CM5) sensor was utilized as described below.

[0384] For use with the SA sensor, VEGF-A was first biotinylated (no more than 2 biotin/ VEGF-A) by incubating the protein with EZ-link NHS-PEG4-Biotin (Pierce) in a 1:1.5 molar ratio respectively, in PBS for 2 hours on ice. Reaction was then quenched by addition of 10 molar excess of Glycine pH 8.0 and the sample was buffer exchanged into PBS using an Amicon 0.5 mL 3000 MWCO ultra-centrifugal filters (EMD Millipore). The biotinylation state of the protein was verified by LC-MS analysis. Biotinylated VEGF-A was then captured on the surface until a resonance unit (RU) signal of about -400. For immobilization of VEGF-A on CM5 sensor, the surface was first activated with a mixture of N-ethyl-N'-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide (EDC/NHS) according to the supplier instructions. VEGF-A was then diluted into coupling buffer (0.1 M Acetate Buffer, pH 5.0) and injected until the signal reached about -400 RU followed by a wash with 1 M ethanolamine pH 8.0 to quench remaining activated sites.

[0385] Following the capture step, a series of the peptide concentrations were prepared in HBS-EP buffer with matching DMSO concentrations to 0.1% and injected at a flow rate of pL/min. The resulting sensorgrams were then analyzed using a 1:1 binding model to obtain kinetic data and affinities using Scrubber 2.0 (BioLogic Software).

CKP synthesis andfolding.

[03861 Linear precursor LRP6 peptides were dissolved into DMSO (0.5mg/mL) into 0.iM ammonium bicarbonate (pH 9), 1mM reduced glutathione in 50% DMSO and incubated while shaking at room temperature for 24h. Folded CKPs were purified by RP HPLC on a C18 column and then collected fractions were analyzed by mass spectrometry, pooled and lyophilized prior to use.

Cell culture and transfection.

[0387] HEK293 cells stably transfected with a firefly luciferase Wnt reporter (Gong et al. (2010) PLoS ONE 5,9: e12682). and pRL-SV40 Renilla luciferase (Promega) were grown to 90% confluence in DMEM:F12 (50:50) supplemented with 10% FBS, 2 mM GLUTAMAX T and 40 g/ml hygromycin. Cells were incubated in a 5%CO2humidified incubator at 37 °C for 24 h. Following the incubation, the cells were trypsinized (0.05% Gibco 15400-54 in PBS) then diluted to 4x10 5 cells/ml in DMEM:F12 (50:50) supplemented with 10% FBS, 2 mM GLUTAMAX TM. 20,000 cells were loaded into individual wells of white microtest 96-well optilux plates (catalog no. 353947) and incubated for-24h. Each well was transfected using FUGENE@ HD with Wntl-pCDNA3.2 (5ng/well) or Wnt3a pCDNA3.2 (25ng/well) then grown for 24h. All LRP6-binding variants were diluted in DMSO and added to cells at a final DMSO concentration of 1% at peptide concentrations of , 0.1, 0.1, 1.0, 10, and 100 pM for 6 hours. For stimulation with recombinant Wnt3a (5036

128 17800220_1 (GHMatters) P108077.AU.1

WN-010/CF, R&D Systems) was diluted in PBS to 50ng/mL and added to the incubation media with the indicated CKP.

[03881 Luciferase response in all assays was then measured with Promega's DUAL GLO@ kit according to the manufacturer's instructions, except using half the volume of each reagent. Firefly luminescence and Renilla luminescence were measured on a Perkin Elmer ENVISIONTM Multilabel Reader. The ratios of firefly luminescence: Renilla luminescence were calculated and normalized to the ratio in control cells expressing or treated with the indicated Wnt protein. Inhibitory constants were calculated using normalized data in Prism Graphpad using the using the log(inhibitor) vs. normalized response - variable slope Y=100/(1+10^((LogIC5-X)*HillSlope)). Statistical significance was determined using the Holm-Sidak method, with alpha=5.000%. Computations assume that all rows are sample from populations with the same scatter (SD) and IC5 were identified as significantly different using the Extra sum-of-squares F test where P<0.05 when significant.

Example 2A: Generationof non-naturallyoccurringEETI-I variants that bind VEGF-A

[03891 EETI-II(FIG. 1) was chosen as a scaffold for display on the surface of M13 bacteriophage. EETI-IIwas fused to the N terminus of M13 major coat protein p8. Furthermore, a gD-tag was engineered N terminal of EETI-II sequence in order to verify display levels. Three peptide phage libraries were generated based on the EETI-II framework as follows: library I in which loop 1 amino acid residues were randomized and the loop length was varied (6, 8, 10 residues); library II in which loop 5 amino acid residues were randomized and the native loop length was fixed; and library III in which both loops 1 and 5 were randomized in amino acid content simultaneously and loop 1 length was varied from 6 to 10 amino acid residues while loop 5 length was fixed. Altogether, the three libraries contained 3 x 1010 unique members and were cycled through rounds of selection against VEGF-A.

[03901 Panning against VEGF-A generated thirteen unique variants that bound to hVEGF8-ia0 (see Table 19). These variants contained variations in amino acid composition in loop 1 or both loops 1 and 5 simultaneously. Also, a number of variants had a longer loop compared to the native loop present in EETI-II. A conserved YXS motif was also apparent in loop 5. We generated soluble folded cystine-knot peptides that correspond to seven of these unique variants, and they all demonstrated binding to hVEGF-A in a phage competition ELISA (Table 19). Moreover, we assessed some of the variants in a cellular assay and they demonstrated cross-species inhibition of human, mouse and rat VEGF-A activity with IC50 in low gM.

Table 19: EETI-II-based binders against hVEGF-A

VARIANT LOOP 1 LOOP 5 n ELISA S/N*

PRILMR GPNGF EETI-II 0.01 1.11 (SEQ ID NO: 92) (SEQ ID NO: 15)

ETDWYPHQID GPNGF VEGF CKP1 (SEQ ID NO: 2 0.9 16.9 225) (SEQ ID NO: 15)

GETVFEQFLW GPNGF VEGFCKP2 (SEQ ID NO: 2 3.2 48.1 226) (SEQ ID NO: 15)

HMMYDY EMYDA VEGFCKP3 (SEQ ID NO: (SEQ ID NO: 2 3.1 42.9 227) 235)

KKWQWWYM YPWTE VEGF CKP4 (SEQ ID NO: (SEQ ID NO: 5 2.6 35.3 228) 236)

PAIQNWKEHP SWWPSL VEGF CKP5 (SEQ ID NO: (SEQ ID NO: 2 1.9 28.4 229) 237)

VEGFCKP6 PTTRFKQY GPNGF 28 3.5 51.9 (SEQ ID NO: 8) (SEQ ID NO: 15)

VEGFCKP7 QDPTFNWALY QMYQS 2 3.4 54.5 (SEQ ID NO: 9) (SEQ ID NO: 16)

QLMHPFWG HWYRS VEGF CKP8 (SEQ ID NO: (SEQ ID NO: 2 3.9 59.4 230) 238)

VEGFCKP9 QLMQPFWG HWYQS 11 3.3 36.0 (SEQ ID NO: 10) (SEQ ID NO: 17)

VEGF CKP10 RDLDVKWD QYYSS 3 3.2 43.7 (SEQ ID NO: 11) (SEQ ID NO: 18)

RTPWEPHDIT GPNGF VEGFCKP1l 16 4.1 57.5 (SEQ ID NO: 12) (SEQ ID NO: 15)

TTPWPPHEIM GPNGF VEGFCKP12 75 3.5 55.2 (SEQ ID NO: 13) (SEQ ID NO: 15)

VTPWKPHWIN GPNGF VEGFCKP13 2 3.5 56.3 (SEQ ID NO: 14) (SEQ ID NO: 15)

*S/N = signal to noise ratio as compared to BSA control

130 17800220_1 (GHMatters) P108077.AU.1

Table 20: Phage Competition ELISA and cellular inhibitory activities of soluble EETI-II-based binders against hVEGF-A

TIn vitro Cellular Assay IC5 0 (pM) hVEGF-A mVEGF rVEGF (25 ng/ml) (50 ng/ml) (50 ng/ml) VEGF CKP6 3 47 169 711.2 (partial)

VEGF CKP7 12 18 39 7

VEGF CKP9 0.6 12 10 1

VEGF CKP10 1 45 ND* 18

VEGF CKP11 80 ND* ND* ND*

VEGFCKP12 60 102 243 1220 (partial)

VEGFCKP13 80 ND* ND* ND*

*ND= not determined

[0391] To further improve the potency of these variants, we followed up on VEGFCKP7 and VEGFCKP9. Soft randomization was done on loops 1 and 5 within the VEGF-CKP7 framework, resulting in 16 unique variants that bound to human VEGF-A (see Table 21 below).

Table 21: CKP_7 Affinity-matured binders against hVEGF-A

VARIANT LOOP 1 LOOP 5 n ELISA S/N*

VEGFCKP7 QDPTFNWALY QMYQS 1 0.1 1.3 (SEQ ID NO: 9) (SEQ ID NO: 16)

DDPSFDWSVY RMYDS VEGF CKP7.2 (SEQ ID NO: (SEQ ID NO: 1 1.2 21.5 287) 292)

KNPLFNWALY QLFDS VEGF_CKP7.8 (SEQ ID NO: 2 0.5 7.5 60) SEQ ID NO: 71)

QDPTVNWAVY QFYQS VEGFCKP7.17 (SEQ ID NO: (SEQ ID NO: 72) 1 0.8 13.4 61)

QDPTFNWAEY QLYQS VEGF_CKP7.19 (SEQ ID NO: 2 0.6 11.1 62) (SEQ ID NO: 73)

WDPTFNWALY QMYDS VEGFCKP7.24 (SEQ ID NO: (SEQ ID NO: 76) 2 0.8 13.4 288)

VEGFCKP7.35 QDPTFNWAEY QMYQS 3 0.6 10.6 (SEQ ID NO: (SEQ ID NO: 16)

131 17800220_1 (GHMaters) P108077.AU.1

62) QDPTLNWATY QMYQS VEGFCKP7.43 (SEQ ID NO: (SEQ ID NO: 16) 1 0.5 6.3 289) EDPTVDWAQY QMYQS VEGF CKP7.46 (SEQ ID NO: 1 0.3 4.9 290) (SEQ ID NO: 16)

QDPSLNWADY QMHQS VEGF_CKP7.50 (SEQ ID NO: (SEQ 10 NO: 74) 1 0.8 14.3 63)

LDRTLNWALY QMYNS VEGFCKP7.54 (SEQ ID NO: (SEQ ID NO: 75)9.3 64)

LDPSFNWSLY QMYDS VEGF_CKP7.57 (SEQ ID NO: 2 1.0 17.4 65) (SEQ ID NO: 76)

RDLTINWALF QMFNS VEGF CKP7.73 (SEQ ID NO: (SEQ ID NO: 1 1.2 19.2 66) 274) KDTTFNWGLF QLYQS VEGFCKP7.78 (SEQ ID NO: (SEQ ID NO: 73) 1 0.7 11.8 291) LDPTVNWALF QHK VEGF CKP7.81 (SEQ AID NO:1 1.1 18.6 (SEQ ID NO: (SEQ ID NO: 77) 67)

QDPKLNWAVY QLFNS VEGFCKP7.88 (SEQ ID NO: 2 0.5 7.7 68) (SEQ ID NO: 78)

LDPSFDWALY QLYNS LRP6_CKP7.89 (SEQ ID NO: (SEQ ID NO: {1 0.5 8.1 69)(SQINO79

*S/N = signal to noise ratio as compared to BSA control

[03921 Soft randomization was done on loops 1 and 5 within the VEGF-CKP9 framework, resulting in 16 unique variants that bound to human VEGF-A (see Tables 22-24 below).

Table 22: VEGFCKP9 Loop1 Affinity-Matured Variants Against VEGF-A

VARIANT Li SEQUENCE n ELISA S/N*

VEGFCKP9 QLMQPFWG0.4 7.4 (SEQ ID NO: 10)

HLFEPLWG VEGFCKP9.L1.2 17 1.6 12.5 (SEQ ID NO: 245)

132 17800220_1 (GHMaters) P108077.AU.1

VEGFCKP9.L1.7 QVMRPFWG 3 1.5 8.9 (SEQ ID NO: 246)

VEGFCKP9.L1.8 QVMQPAWG 1 1.2 12.8 (SEQ ID NO: 247)

VEGFCKP9.L1.19 HRLQPLWG 3 1.4 11.6 (SEQ ID NO: 248)

VEGF CKP9.L1.26 ELLQPSWG4 1.7 11.9 (SEQ ID NO: 249)

NPMLPFWG VEGF CKP9.L1.57 3 3.7 31.8 - (SEQ ID NO: 368)

NVLLPLWG VEGFCKP9.L1.64 1 2.3 19.9 (SEQ ID NO: 250)

VEGFCKP9.L1.68 DIMQPLWG 1 2.0 23.2 (SEQ ID NO: 36)

VEGFCKP9.L1.76 DLMQPLWG 2 2.5 17.4 (SEQ ID NO: 251)

NPMLPLWG VEGF CKP9.L1.78 1 3.0 25.1 - (SEQ ID NO: 252)

VEGF CKP9.L1.79 QVLQPSWG 1 1.2 10.0 (SEQ ID NO: 253)

*S/N = signal to noise ratio as compared to BSA control

Table 23: VEGFCKP9 Loop5 Affinity-Matured Variants Against VEGF-A

VARIANT L5 SEQUENCE n ELISA S/N*

VEGFCKP9 HWYQS 0.9 11.6 (SEQ ID NO:17)

RWYNS VEGFCKP9.L5.7 11 1.4 18.9 (SEQ ID NO: 133)

VEGFCKP9.L5.18 HWYQS 1 1.6 20.4 (SEQ ID NO: 17)

RWYHS VEGFCKP9.L5.43 2 0.9 13.6 (SEQ ID NO: 43)

*S/N = signal to noise ratio as compared to BSA control

Table 24: VEGFCKP9 Loopl/Loop5 Affinity-Matured Variants Against VEGF-A

VARIANT LOOP 1 LOOP 5 n ELISA S/N*

QLMQPFWG HWYQS VEGF - CKP9 (SEQ ID NO: 10) (SEQ ID NO:17)

133 17800220_1 (GHMaters) P108077.AU.1

VEGF CKP9.2 DVLQPFWG HWYQS 20 2.4 31.1 (SEQ ID NO: 28) (SEQ ID NO: 17)

VEGFCKP9.3 QISQPFWG HFYNS 1 1.6 24.5 (SEQ ID NO: 29) (SEQ ID NO: 41)

VEGF CKP9.4 DRMQPLWG LWYKS N/D N/D (SEQ ID NO: 30) (SEQ ID NO: 42)

QLLEPMWG HWYNS VEGF CKP9.9 (SEQ ID NO: 254) (SEQ ID NO: 46)

VEGF CKP9.14 KLLQPMWG RWYQS 1 2.0 30.1 (SEQ ID NO: 255) (SEQ ID NO: 44)

VEGF CKP9.11 DRMQPYWG QWYKS1 1.1 14.1 (SEQ ID NO: 256) (SEQ ID NO: 262)

NLMLPFWG RWYHS VEGFCKP9.20 1 1.7 13.3 (SEQ ID NO: 31) (SEQ ID NO: 43)

VEGF CKP9.22 QRTQPFWG RWYQS 1 1.2 17.2 (SEQ ID NO: 32) (SEQ ID NO: 44)

VEGF CKP9.47 KIMQPLWG LWYDS 1 1.0 14.6 (SEQ ID NO: 257) (SEQ ID NO: 263)

NLMHPFWG HWYQS VEGF CKP9.51 (SEQ ID NO: 258) (SEQ ID NO: 17)

VEGF CKP9.54 NIMLPFWG QYYQS 1 2.1 28.4 (SEQ ID NO: 33) (SEQ ID NO: 45)

VEGF CKP9.59 DPMQPFWG RWYQS N/D N/D (SEQ ID NO: 34) (SEQ ID NO: 44)

VEGF CKP9.63 DVMQPYWG HWYNS 1 2.0 29.7 (SEQ ID NO: 35) (SEQ ID NO: 46)

VEGF CKP9.69 ALLQPLWG RWYNS 1 1.0 14.3 (SEQ ID NO: 259) (SEQ ID NO: 133)

VEGF CKP9.71 QLLQPLWG RWYQS 1 1.0 16.5 (SEQ ID NO: 37) (SEQ ID NO: 44)

VEGFCKP9.72 RLLEPSWG QWYQS 1 0.6 10.0 (SEQ ID NO: 260) (SEQ ID NO: 264)

HLLLPLWG RWYHS VEGF CKP9.76 1 1.3 15.5 (SEQ ID NO: 261) (SEQ ID NO: 43)

KLFEPLWG RWYES VEGFCKP9.96 1 1.2 18.4 (SEQ ID NO: 39) (SEQ ID NO: 567)

*S/N = signal to noise ratio as compared to BSA control

[03931 These clones were selected for further validation in a phage titration assay, and soluble folded forms corresponding to ten of these sequences were generated for further in vitro assessment (see Table 25 below). From this set of variants, VEGFCKP9.2,

VEGFCKP9.54 and VEGFCKP9.63 exhibited improved potency against VEGF-A compared to parent VEGF-CKP9 in in vitro and cellular assays, with IC5o in 100 - 200 nM range (see Table 25).

Table 25: Inhibitory activity in phage competition ELISA and VEGF-A-KDR interaction ELISA

phage ELISA Cellular VARIANT ICso(RM) IC5o(nM) VEGF CKP9 1.36 11700

VEGFCKP9.2 0.168 270 VEGF CKP9.3 1.50 N/D VEGF CKP9.4 1.95 N/D

VEGF CKP9.20 1.34 N/D VEGF CKP9.22 >100 N/D VEGF CKP9.54 0.45 188 VEGF CKP9.59 5.82 N/D

VEGF CKP9.63 0.146 140 VEGF CKP9.96 49.00 N/D

[03941 To enhance potency, we selected the lead 9.54 and 9.63 molecules and generated new phage libraries based on these frameworks in which loop 2 was randomized. The new libraries were panned against hVEGF-A and yielded a number of loop 2 variants which demonstrated significantly improved potency against VEGF-A compared to parent 9.54 and 9.63 molecules (see Tables 26 and 27 below, respectively), with the most potent molecules exhibiting IC50in 0.5 - 2 nM range (see Table 28 below).

Table 26: Affinity-matured VEGF-A binding loop 2 variants based on 9.54 framework

VARIANT LOOP 1 LOOP 2 LOOP 5 n ELISA S/N*

QLMQPFWG KQDSD HWYQS VEGFCKP9 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 10) 93) 17) NIMLPFWG KQDSD QYYQS VEGFCKP9.54 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 33) 93) 45) VEGFCKP9.54. NIMLPFWG GQSFE QYYQS 80 2.4 29.9 1 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO:

135 17800220_1 (GHMaters) P108077.AU.1

33) 94) 45)

NIMLPFWG GLDYD QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 0.1 26 2 33) 95) 45) NIMLPFWG GPELN QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.4 38.8 12 33) 298) 45) NIMLPFWG QADYA QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.5 23.5 14 33) 299) 45) NIMLPFWG GVDYL QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.4 30.8 16 33) 300) 45) NIMLPFWG GTNFL QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.3 32.5 31 33) 301) 45) NIMLPFWG SRDFD QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.4 34.4 44 33) 302) 45) NIMLPFWG NRDFL QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.5 34.9 48 33) 303) 45) NIMLPFWG GWDQF QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.5 44.5 51 33) 304) 45) NIMLPFWG GKDFH QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.3 35.8 56 33) 305) 45) NIMLPFWG GPDLQ QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.3 35.4 59 33) 96) 45) NIMLPFWG SGDFA QYYQS VEGF CKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.2 22.4 64 33) 306) 45) NIMLPFWG GKELN QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.5 21.7 69 33) 307) 45) NIMLPFWG GWSMD QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.7 42.2 76 33) 308) 45) NIMLPFWG GYDLQ QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.4 26.1 87 33) 309) 45) NIMLPFWG GRDFE QYYQS VEGFCKP9.54. (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1 2.3 29.5

33) 97) 45)

*S/N = signal to noise ratio as compared to BSA control

Table 27: Affinity-matured VEGF-A binding loop 2 variants based on VEGFCKP9.63 framework *S/N = signal to noise ratio as compared to BSA control

VARIANT LOOP 1 LOOP 2 LOOP 5 ELISA S/N*

QLMQPFWG GRDLQ HWYQS VEGF CKP9 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 10) 322) 17)

GVDLS HWYNS VEGF CKP9.6 DVMQPYWG 3 - (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 35) 323) 46)

DVMQPYWG GPDID HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.0 25.2 3.1 35) 118) 46) DVMQPYWG GDDLE HWYNS VEGFCKP 9 .6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.0 15.0 3.2 35) 324) 46) DVMQPYWG GVDMT HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.7 20.7 3.3 35) 325) 46)

DVMQPYWG GMDIE HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.6 39.9 3.12~ 35) 326) 46) DVMQPYWG DGDYQ HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.5 21.3 3.14~ 35) 327) 46) DVMQPYWG GNDVS HWYNS VEGFCKP 9. 6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.5 21.4 3.15 35) 328) 46)

DVMQPYWG GRDMD HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.2 10.3 3.16- 35) 119) 46)

DVMQPYWG AGDEL HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.3 17.3 3.18~ 35) 329) 46)

DVMQPYWG GLDEE HWYNS VEGFCKP 9. 6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.6 20.4 3.24 35) 330) 46)

DVMQPYWG DGDFD HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.1 26.0 3.27 35) 331) 46)

DVMQPYWG AGDFE HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.0 26.0 3.30- 35) 332) 46) VEGFCKP9.6 DVMQPYWG EMDFD HWYNS 0.6 8.6 3.37 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO:

137 17800220_1 (GHMatters) P108077.AU.1

35) 120) 46)

DVMQPYWG GNSFE HWYNS VEGFCKP 9 .6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.6 18.9 3.39~ 35) 333) 46)

DVMQPYWG GQDLT HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.7 23.1 3.42 35) 334) 46)

DVMQPYWG GENLA HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ IDNO: (SEQ ID NO: 1.7 19.5 3.44 35) 335 46)

DVMQPYWG GQDYN HWYNS VEGFCKP 9 .6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.7 20.7 3.47 35) 336) 46)

DVMQPYWG GADLS HWYNS VEGFCKP 9 .6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 0.9 12.7 3.50 35) 337) 46)

DVMQPYWG GFDMD HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.4 19.9 3.54 35) 338) 46)

DVMQPYWG GESLS HWYNS VEGFCKP9.6 3.56~ (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.8 8.4 35) 211) 46)

DVMQPYWG DLNYE HWYNS VEOFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 1.8 25.4 3.62~ 35) 339) 46) DVMQPYWG GRDLQ HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.0 27.1 3.65 35) 322) 46) DVMQPYWG GVDLS HWYNS VEGFCKP9.6 3.69~ (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 2.9 23.7 35) 323) 46) DVMQPYWG GPDID HWYNS VEGFCKP9.6 3.87~ (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 0.9 8.6 35) 118) 46)

Table 28. Inhibitory activity of VEGFCKP9.54- and VEGFCKP9.63-derived loop 2 variants against VEGF-A

KDR-VEGF Cellular VARIANT LOOP 1 LOOP 2 LOOP 5 IC5 0 IC5o (nM) (nM) QLMQPFWG KQDSD HWYQS VEGFCKP9 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 569 11700 10) 93) 17)

VEGFCKP9.5 NIMLPFWG KQDSD QYYQS 5.8 188

138 17800220_1 (GHMaters) P108077.AU.1

4 (SEQ ID NO: (SEQ ID NO: (SEQ ID NO: 33) 93) 45)

NIMLPFWG GQSFE QYYQS VEGFCKP9.5 (SEQ ID NO: (SEQ ID NO: 0.2 1.47 4.1 (SEQ ID NO: 33) 94) 45)

NIMLPFWG GLDYD QYYQS VEGF CKP9.5 (SEQ ID NO: (SEQ ID NO: 0.2 4.3 4.2 (SEQ ID NO: 33) 95) 45) NIMLPFWG GPDLQ QYYQS VEGFCKP9.5 (SEQ ID NO: (SEQ ID NO: 0.5 3.06 4.59 (SEQ ID NO: 33) 96) 45)

NIMLPFWG GRDFE QYYQS VEGF CKP9.5 (SEQ ID NO: (SEQ ID NO: 0.2 1.35 4.90 (SEQ ID NO: 33) 97) 45)

DVMQPYWG KQDSD HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: 10.8 140 3 (SEQ ID NO: 35) 93) 46)

DVMQPYWG GENFL HWYNS VEGF CKP9.6 (SEQ ID NO: (SEQ ID NO: 0.4 0.49 3.1 (SEQ ID NO: 35) 117) 46)

DVMQPYWG GRDMD HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: 0.3 5.28 3.27 (SEQ ID NO: 35) 119) 46)

DVMQPYWG EMDFD HWYNS VEGF CKP9.6 (SEQ ID NO: (SEQ ID NO: 0.2 2.05 3.44 (SEQ ID NO: 35) 120) 46)

DVMQPYWG GESLS HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: 2.1 26.4 3.69 (SEQ ID NO: 35) 211) 46)

DVMQPYWG GPDID HWYNS VEGFCKP9.6 (SEQ ID NO: (SEQ ID NO: 0.7 1.83 3.12 (SEQ ID NO: 35) 118) 46)

[03951 The affinities / potencies of VEGFCKP9.63.1, VEGFCKP9.63.27, VEGFCKP9.63.44, VEGFCKP9.63.69, and VEGFCKP9.63.12 for hVEGF-A (8-109) are shown below in Table 29.

Table 29

VARIANT ka kd KD

EM63 0.16 ± 0.03 1.6 ± 0.5 100 9 nM

L2.9.63.1 6 ± 1 0.37 ± 0.13 5.8 1.2

L2.9.63.12 8 ± 1 0.10 ± 0.04 1.1 i 0.2

139 17800220_1 (GHMatters) P108077.AU.1

L2.9.63.27 11 ± 4 0.15 ± 0.04 1.4 ± 0.2

L2.9.63.44 10 i 2 0.11± 0.02 1.2 ± 0.2

L2.9.63.69 3 1 0.20 ± 0.04 6.9 ± 0.7

[03961 Variants VEGFCKP9.54.90 (see row 2 of Table 26) and VEGF_CKP9.63.12 (see row 6 of Table 27), as well as parental variants VEGFCKP9.54 (see row 12 of Table 24) and VEGFCKP9.63 (see row 15 of Table 24), bind with similar affinity to human, mouse, rat and rabbit VEGF-A, as determined by surface plasmon resonance. See Table 30 below.

Table 30: Binding kinetics and affinities of VEGFCKP9.54.90, VEGFCKP9.63.12, VEGFCKP9.54, and VEGFCKP9.63 for various VEGF isoforms.

ka ka (error) kd kd (error) KD (nM) (r VARIANT VEGF Isoform (error)

9.54 human 8-109 1.26x106 1.10x10 5 2.18x10- 1 1.19x10-2 175.88 18.21

5 human 165 8.23x10 1.11x10 5 1.49x10-1 1.29x10-2 189.67 34.57

4 1 mouse 164 8.26x10 5 2.93x10 2.07x10- 2.44x10- 2 249.87 21.19

1 rat 1.93x106 8.91x10 5 2.96x10- 9.36x10- 2 175.64 26.27

5 1 rabbit 2.10x106 7.12x10 2.74x10- 9.14x10- 2 133.22 9.47

7 4.05x10- 2 3 9.54.90 human 8-109 5.15x10 1.62x10 7 8.77x10- 0.87 0.13

human 165 1.58x107 3.87x10 6 1.33x10- 2 1.70x10- 3 0.89 0.10

6 mouse 164 8.71x10 6 2.79x10 1.01x10-2 2.12x10- 3 1.31 0.24

1.72x10 7 6 1.35x10- 2 3 rat 7.43x10 3.33x10- 0.90 0.14

rabbit 5.15x107 1.36x10 7 6.75x10- 2 8.99x10-3 1.14 0.18

6.62x10 5 4 9.63 human 8-109 9.83x10 1.81x10- 1 2.56x10- 2 281.44 43.53

5 2 human 165 3.40x10 2.79x10 4 1.30x10-1 1.33x10- 381.89 19.15

5 4 1.60x10- 1 2 mouse 164 5.57x10 4.60x10 1.35x10- 288.75 11.08

5 1.49 x10 5 1 rat 4.56x10 2.46x10- 9.23x10- 2 523.93 25.06

5 4 rabbit 4.24x10 3.22x10 1.30x10-1 1.95x10- 2 311.43 52.25

5 3 9.63.12 human 8-109 6.54x106 7.25x10 2.50x10-2 3.45x10- 3.20 0.22

human 165 4.65x106 8.39x10 5 2.O1xO-2 3.95x10-3 4.32 0.15

140 17800220_1 (GHMatters) P108077.AU.1

1.32x10- 2 3 mouse 164 1.04x10 2.81x10 5 3.04x10- 13.07 1.74

6.44x10 6 6 rat 3.87x10 2.59x10- 2 1.iX10-2 5.74 1.54

6.91x10 6 6 3 rabbit 1.35x10 1.78x10- 2 4.46x10- 2.54 0.40

[03971 VEGFCKP9.54.90 is also highly selective to VEGF-A and does not bind to or inhibit the activity of other VEGF isoforms such as VEGF-B, VEGF-C and VEGF-D or other growth factors such as PlGF, EGF, NGF, IGF and PDGF. As shown in FIGS. 2A and 2B, the variant VEGF_CKP9.54.90 disrupts the interaction between VEGF-A and KDR as well as the interaction between VEGF-A and Flt-1, but not disrupt the interaction between VEGF B and Flt-1, between VEGF-C and Flt-4, between VEGF-D and Flt-4, between PIGF-2 and Flt-1, between EGF and EGFR, between PDGF and PDGFR, between NGF and NGFR, or between IGF and IGFR.

[03981 Unlike EETI-II, VEGF_CKP9.54.90, VEGFCKP9.54, and VEGF_CKP9.63.12 do not inhibit trypsin protease activity as measured in a peptide substrate cleavage assay (Stanger et al. (2014) FEBS Lett. 588 (23), 4487-96). See FIG. 3. However, VEGFCKP9.54.90 and VEGFCKP9.63.12 maintain a degree of resistance to trypsin digestion (see FIG. 4). Approximately 20% of VEGFCKP9.54.90 was cleaved at Argl3 within loop 2 after 24 h incubation with trypsin at 37C.

[03991 VEGFCKP9.54,VEGFCKP9.63, and VEGFCKP9.54.90 each contains roughly a 3-turn alpha-helix and each adopts a disulfide signature that is distinct from that of wild-type EETI-II (Cl-C4, C2-C3, C5-C6 for VEGFCKP9.54.90 vs. C1-C4, C2-C5, C3-C6 for wild-type EETI-II). See FIG. 5. On one side of the helix, VEGF_CKP9.54.90 forms a fused bicyclic structure that is bridged by two disulfide bonds (C1-C4 and C2-C3), encompassing loops 1, 2 and 3, and ~ 1.5 turn of the alpha-helix. Loop 5 forms on the opposite side of the helix and is constrained by C5-C6 disulfide bond.

[0400] The co-crystal structures of VEGF_CKP9.54, VEGF_CKP9.63, and VEGF_CKP9.54.90 in complex with VEGF-A were obtained. co-crystal structures of VEGFCKP9.54, VEGFCKP9.63, and VEGFCKP9.54.90 in complex with VEGF-A are highly similar. See FIGS. 5 and 6 for the co-crystal structure of VEGF_CKP9.54 in complex with VEGF-A. Given that the structures of VEGFCKP9.54, VEGFCKP9.63, and VEGF_CKP9.54.90 are highly similar, (see FIGS. 5 and 6) further studies were performed with VEGFCKP9.54.90. The helix defined by residues Phel5 - Tyr26 of VEGF_CKP9.54.90 forms extensive hydrophobic and polar interactions with the VEGF-A surface (see Table 31 below). Additionally, there is a network of backbone H-bonds which forms within and stabilizes the -3-turn alpha-helix. In general, VEGFCKP9.54.90 exhibits a compact and rigid structure, stabilized by intramolecular polar and hydrophobic contacts, including backbone-backbone, side chain-backbone and side chain-side chain interactions (Table 32). The surface of VEGFCKP9.54.90 that contacts VEGF-A is mainly hydrophobic in nature with few polar side chains (Table 31), whereas the opposite surface of the peptide that is not interacting with VEGF-A is solvent-exposed and primarily polar in nature.

Table 31: VEGFCKP9.54.90 residues that are within 4 Aof the VEGF-A dimer

VEGFCKP9.54.90 residues within 4 i of VEGFA

VEGFCKP9.54.90 VEGFCKP9.54.90 (Chain 1) (Chain 2) 14 14

M5 M5 L6 L6 P7 P7

F8 F8

W9 W9 R13 R13 D14 D14

F15 F15 L18 L18 A19 A19 V22 V22 C23 C23 Y25 Y25 Y26 Y26 Q27 Q27 S28 S28

G30 G30

Table 32: Summary of VEGFCKP9.54.90 intra-molecular interactions

Residue 1 Residue 2 Comments Cys2 Cys21 Disulfide

Asn3 Trp9 Main chain H-bond

Asn3 Met5 Asp3 makes H-bond with M5 main chain nitrogen

142 17800220_1 (GHMaters) P108077.AU.1

Asn3 Leu6 Main chain H-bond Leu6 Trp9 Main chain H-bond Pro7 Gly1O Main chain H-bond Phe8 Cys11 Main chain H-bond Phe8 Leul8 Van der Waals interaction

le4, Leul8, Val22, Core Trp makes a network of Van der Waals Trp9 Tyr25, Tyr26 interactions Cys11 Cys17 Disulfide

Gly12 Asp14 Main chain H-bond

Asp 14 Glul6, C17 Asp14 makes stabilizing H-bond with N-terminus of helix Phe15 Leul8, Ala19 Van der Waals interactions stabilizing helix

Leul8 Val22 Van der Waals interactions stabilizing helix

Val22 Tyr26 Van der Waals interactions stabilizing helix

Phe15 - Tyr26 Network of backbone H-bonds form stabilizing a ~3 turn helix

Cys23 Cys29 Disulfide

Tyr25 Tyr26 Van der Waals interactions stabilizing helix

Gln27 Cys23 Main chain H-bond

Ser28 Cys23 Main chain H-bond

[04011 The binding interface of VEGFCKP9.54.90 on VEGF-A overlaps with that of the natural receptors and G6.31 antibody (FIGS. 7 and 8). Contact residues on VEGF-A that are in the peptide interface are summarized in Table 33 and shown in FIG. 9. The binding epitope of VEGFCKP9.54.90 on VEGF-A is distinct from that of ranibizumab and bevacizumab (FIG. 10), which do not bind to mouse or rat VEGF-A because their interaction with human VEGF-A is dependent on a key Gly88 residue that is substituted with Ser in rodents. The binding mode of VEGFCKP9.54.90suggests that it is not substantially dependent on Gly88, and this notion is validated by the observation that the peptide bound efficiently to both human and rodent VEGF-A. Site-directed mutagenesis was utilized to validate a number of contacts in the protein - peptide interface observed from the crystal structure. As expected, Y21A, Q89A and F17A/M81A mutations on VEGF-A led to reduced binding of VEGFCKP9.54.90on VEGF-A. See FIG. 11. However, K48A mutation enhanced the binding of VEGFCKP9.54.90by ~ 2-3 fold, a behavior that is similar to that observed with the G6.31 antibody (Fuh et al. (2006) J Biol. Chem. 281, 6625-6631). See Table 34 below and FIG. 11.

Table 33. VEGF-A dimer residues that are within 4Aof VEGFCKP9.54.90

VEGF-A residues within 4 A of VEGFCKP9.54.90

VEGF-A (Dimer Chain A) VEGF-A (Dimer Chain B)

V14 V15 F17 F17

M18 M18

D19

Y21 Y21

Q22 Q22 Y25 Y25

146 146

K48 K48

N62 N62

D63 D63 L66 L66 M81 M81

183 183 K84 K84

P85 P85 H86 H86 Q87 Q87 G88 G88 Q89 Q89 191

C104

R105

P106 P106

Table 34: Binding kinetics and affinities of VEGFCKP9.54.90, VEGFCKP9.63.12, VEGFCKP9.54, and VEGFCKP9.63 for various hVEGF-A mutants.

ka kd KD KD V T VEGF ka MUTANT (error) (error) (nIM) (error) 7 WT 7.81x10 1.86x107 0.0300 9.79x10-3 0.37 0.09 7 2 Y21A 3.72x107 1.30x10 0.1202 2.44x10- 3.50 0.30 9.54.90 7 7 3 K48A 6.04x10 2.12x10 0.0116 3.77x10- 0.19 0.02 7 6 2 Q89A 1.71x10 8.38x10 0.1458 5.99x10- 8.80 0.45

144 17800220_1 (GHMaters) P108077.AU.1

F17A/M81A 6 6 WT 8.43x10 1.47x10 0.0096 0.0035 1.07 0.20 7 6 2 Y21A 1.99x10 6.84x10 1.48x10-1 3.13x10- 9.84 4.41

9.63.12 K48A 5.30x107 3.77x10 7 0.017 0.013 0.33 0.01 6 6 Q89A 7.43x10 2.09x10 0.47 2.71x10-1 36.49 1.62

F17A/M81A

WT 4.10x10 6 8.59x10 5 0.2349 0.0778 55 7 5 3 Y21A 6.63x10 6.39x10 0.2101 0.0389 317 56

9.54 K48A 2.64x10 6 2.24x10 5 0.0587 0.0010 22 3 5 5 Q89A 3.37x10 1.41x10 0.7932 0.5101 1882 460

F17A/M81A

WT 1.57x10 6 3.14x10 5 0.1624 0.05 100.34 9.40 5 5 Y21A 7.52x10 2.45x10 0.4814 2.13x10-1 584.85 112.171 5 5 3 9.63 K48A 5.72x10 1.75x10 0.02 5.24x10- 28.4 4.8 5 Q89A 2.66x10 8.01x10 4 0.51 1.22x10-1 1999.8 127.5

F17A/M81A

[04021 Next, VEGF-A binding variants VEGF_CKP9.54.90, VEGF_CKP9.63.12, and VEGF_CKP9.63.44 were assessed for their in vivo efficacy in a VEGF-A driven model of choroidal neovascularization. Laser-burnt spots were created in rat eyes and the formation of new vessels was monitored after a 14-day period in the presence and absence of peptide that was administered intravitreally at different intervals. Peptide VEGFCKP9.54.90 demonstrated effective inhibition of laser-induced choroidal neovascularization in rat eyes, as measured by the significant reduction observed in neovascular area in peptide-treated eyes compared to control eyes. See FIG. 12.

[0403] The co-crystal structure of VEGFCKP9.54.90 in complex with VEGF-A revealed that the native amino acid residues in loops 3 and 4 are not necessarily in optimal orientations for binding to VEGF-A (see FIG. 9) and could be modified to enhance their interaction with the VEGF-A surface or to elicit intramolecular interactions within the peptide that could improve peptide folding and stability. Therefore, with the goal of further improving the potency and behavior of the lead molecules, new phage libraries were constructed based on the sequences of 9.54, 54.1 and 9.63, 63.12 in which only loops 3 and 4 were randomized. These specific frameworks, though slightly weaker than the lead molecules, were selected in order to allow for a sufficient dynamic range in the assay to detect improvement in affinity. Many new clones containing variations in loops 3 and 4 only were identified that showed improved binding to VEGF-A. Fourteen of the obtained sequences were selected and grafted onto loops 3 and 4 within the lead VEGFCKP9.54.90 or VEGFCKP9.63.12 molecules, and the corresponding soluble molecules were then generated in folded form. The amino acid sequences of the fourteen affinity-matured variants are provided in Table 35 below.

Table 35: Affinity-matured VEGF-A binding loop 3/loop 4 variants based on VEGFCKP9.54.90 or VEGFCKP9.63.12 frameworks

VARIANT LOOP 1 LOOP 2 LOOP 3 LOOP 4 LOOP 5

NIMLPFWG GRDFE QYYQS .54.90.7 LQQ I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.10 VER I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.12 MSD I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.13 MNQ I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.25 MQT I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.31 VYQ I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.44 FIN I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.53 VSQ I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.55 VTE I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS 3.54.90.62 FYE I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

NIMLPFWG GRDFE QYYQS .54.90.67 MEQ I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

t.54.90.71 NIMLPFWG GRDFE VYR I (SEQ ID NO: 33) (SEQ ID NO: 97) (SEQ ID NO: 45)

DVMQPYWG GPDIDHWN

DVMQPYWG GPIEWYNS 3.63.12.12 (SEQ ID NO: LSN L (SEQ ID NO: 35) 11)(SEQ ID NO: 46)

146 17800220_1 (GHMatters) P108077.AU.1

VEGFCKP9.54.90.67, VEGFCKP9.54.90.53 and VEGFCKP9.63.12.12 had cellular IC50 values in the range of about 0.5 to about 1 nM. See FIG. 13 and Table 36 below.

Table 36: IC5 o values for variants in Table 35

Cellular FOLD IMPROVEMENT VARIANT RELATIVE TO IC5 0 (nM) VARIANT 9.54.90

9.54.90 1.35 1 9.54.90.12 1.20 1.125 9.54.90.13 0.96 1.41 9.54.90.25 1.26 1.07 9.54.90.44 1.16 1.16 9.54.90.62 0.92 1.47 9.54.90.67 1.10 1.23 9.63.12 1.83 0.74 9.63.12.8 N/D

9.63.12.12 0.56 2.41

[04051 The co-crystal structure of VEGFCKP9.63 in complex with VEGF-A revealed that Tyr residue at position 8 within loop1 could form a hydrogen bond with the side chain of Gln22 on VEGF-A. See FIG. 14. In variants derived from VEGFCKP9.54 (such as the variants in Table 35) the amino acid at position 8 is Phe. Therefore, we sought to mutate Phe8 to Tyr I in some of the variants in Table 35, with the goal of improving affinity and/or solubility of the resulting F8Y variant. The F8Y mutation showed a modest improvement on affinity / potency of some of the molecules (e.g., VEGFCKP9.54.1.F8Y, VEGF_CKP9.54.90.F8Y, and VEGFCKP9.54.90.67.F8Y), whereas in few other cases it demonstrated minimal or a slightly negative effect (e.g., VEGFCKP9.54.90.13.F8Y and VEGFCKP9.54.90.62.F8Y). See Table 37, in which the binding affinities of certain variants (as determined by surface plasmon resonance) are compared, and Table 38 in which the potencies of certain variants (as determined by cellular IC5o) are compared. The F8Y substitution helped to improve the solubility of VEGFCKP9.54.90.67.F8Y by about 2 mg/ml. VEGFCKP9.54.90.67.F8Y was selected for further follow-up studies.

147 17800220_1 (GHMaters) P108077.AU.1

Table 37: Binding kinetics and affinities of VEGFCKP9.54.1.F8Y, VEGFCKP9.54.90.F8Y, VEGFCKP9.54.90.67.F8Y, VEGFCKP9.54.90.13.F8Y and VEGFCKP9.54.90.62.F8Y for VEGF-A

VARIANT ka kd KD

VEGF CKP9 1.2 ± 0.3 40 ± 20 5 i 1 pM

VEGF CKP9.54 3.4 ± 0.2 2.3 ± 0.8 44 ± 6 nM

VEGF CKP9.54.1 15 1 2 0.36 ± 0.17 2.2 ± 0.7 nM VEGF CKP9.54.1.F8Y 53 i 12 0.38 ± 0.06 0.78 i 0.11 nM VEGF CKP9.54.90 63 ± 16 0.17 ± 0.05 0.40 ± 0.08 nM VEGF CKP9.54.90.F8Y 70 ± 10 0.27 ± 0.01 0.40 ± 0.05 nM

VEGF CKP9.54.90-Alkyn 50 i 0.3 0.27 ± 0.004 0.49 i 0.05 nM

[0406] The oxidative stability of various CKP variants was assayed as follows: 5pL of 1II mM AAPH (Calbiochem catalog no. 100110) in water was added to 50uL of variant peptide sample (prepared as lmg/mL peptide in 20mM histidine acetate pH 5.5) and the mix was incubated for 16 hours at 40°C. At the end of the incubation, the sample was quenched by addition of 27.5uL of4OmM methionine, followed by addition of 160ul of 20mM Histidine acetate, 100mM sucrose at pH 5.5 to dilute the samples. The reactions were analyzed by LC-MS.

[0407] It was observed that VEGFCKP9.54.90 underwent - 30% oxidation at Met5 within loop 1. Replacement of Met 5 with the unnatural amino acid norleucine rendered VEGFCKP9.54.90 completely resistant to oxidation. The replacement of Met5 with norleucine also had a favorable effect on binding efficiency (- 2-fold improvement). Variants VEGFCKP9.54.90.67 F8Y M5Nle, VEGF CKP9.54.90.53 M5Nle and VEGFCKP9.63.12.12 M5Nle were produced. All three Met5Nle of the Met5Nle variants showed modest improvement in cellular potency by- 1.5 - 2 x compared to their parent molecules.

[0408] Next, the effect of naphthalene-based amino acid substitutions at Trp9 in loop 1 of VEGFCKP9.54.90 on VEGF-A binding affinity was assessed. The crystal structures of VEGFCKP9.54.90 complexed with VEGF indicate that the Trp9 residue of VEGFCKP9.54.90 (and variants derived therefrom) interacts with the VEGF-A surface, with residual space that might allow larger ring systems to fit in. To test this hypothesis, we generated soluble variants of VEGFCKP9.54.90in which the indole ring of Trp9 was replaced with 1- or 2-naphthyl isomers. These molecules showed reduced cellular potency

148 17800220_1 (GHMaters) P108077.AU.1 relative to parent VEGFCKP9.54.90. Further data regarding the potency of VEGFCKP9.54.90-derived variants comprising the F8Y substitution and/or an unnatural amino acid substitution are provided in Table 38:

Table 38: IC5 o values for VEGFCKP9.54.90-derived variants comprising the F8Y substitution and/or an unnatural amino acid substitution.

FOLD Cellular IMPROVEMENT VARIANT RELATIVE TO IC50 (nM) VARIANT 9.54.90

9.54.90 1.35 1 9.54.90.F8Y 1.58 0.85

9.54.90.F7Y.A2G 3.01 0.44

9.54.90.M5.Nle 1.95 0.69 9.54.90.Naphl 5.42 0.24

9.54.90.Naph2 17.1 0.08 9.54.90.13 0.96 1.41 9.54.90.13.F8Y 2.02 0.67 9.54.90.62 0.92 1.47

9.54.90.62.F8Y 1.14 1.18 9.54.90.67 1.1 1.23 9.54.90.67.F8Y 0.66 2.05

[0409] Shortening the lead VEGFCKP9.54.90. F8Y by trimming the two glycine residues at the N- and C-termini to generate variant VEGFCKP9.54.90F7Y A2G) resulted in a slight reduction of cellular potency relative to VEGFCKP9.54.90. See Table 38 above.

Example 2B: Generationof VEGF-A-binding non-naturallyoccurringEETI-H variants comprising C-terminalamino acid extensions

[0410] To identify additional peptide variants with enhanced affinity for VEGF-A, we selected the 9.54 (SEQ ID NO: 52), 9.54.1 (SEQ ID NO: 99) molecules and generated new phage libraries based on these frameworks in which two additional amino acids were added to their C-termini.

[0411] From the 9.54 library, twenty-two clones whose binding signals for hVEGF-A (8 109) were more than 3 times higher than to BSA (background) were identified (Table 39).

149 17800220_1 (GHMaters) P108077.AU.1

These hits contained variations in amino acid composition within loop 2, within loops 2 and 4, or within loops 2, 4, and 5.

Table 39: C-terminal Two-residue Extension Variants Based on 9.54

CLONE ID AMINO ACID SEQUENCE SEQ ID NO

9.54 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCG 52 9.54-28 GCNIMLPFWGCKQDFDCLAGCICQYYQSCGFH 455

9.54-39 GCNIMLPFWGCKQDFDCLAGCICQYYQSCGGE 457 9.54-10 GCNIMLPFWGCKQDSDCLVGCICQYYQSCGSI 458 9.54-32 GCNIMLPFWGCKQDFDCLAGCVCQYYQSCGGR 459 9.54-13 GCNIMLPFWGCKQDFDCLAGCVCQYYQSCGRP 460 9.54-6 GCNIMLPFWGCKQDFDCLAGCVCQYYQSCGQY 461

9.54-24 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGEN 462 9.54-34 GCNIMLPFWGCKQDFDCLAGCVCQYYQSCGDT 463

9.54-9 GCNIMLPFWGCKQDFDCLAGCVCQYYQSCGQH 464 9.54-12 GCNIMLPFWGCKQDSDCLAGCICQYYQSCGQN 465 9.54-17 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGEE 466 9.54-19 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGDD 467 9.54-43 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGDG 468

9.54-5 GCNIMLPFWGCKQDFDCLAGCVCQYYQSCGLE 469 9.54-1 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGTD 470

9.54-4 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGSE 471 9.54-15 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGPE 472 9.54-42 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGTN 473 9.54-27 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGPH 474

9.54-2 GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGMD 475 9.54-21 1GCNIMLPFWGCKQDSDCLAGCVCQYYQSCGSD 476

[0412] From the 9.54.1 library, clones whose binding signals for hVEGF-A (8-109) were more than 3 times higher than to BSA (background) were identified (Table 40).

[0413] Table 40: C-terminal Two-residue Extension Variants Based on 9.54.1

CLONE ID AMINO ACID SEQUENCE SEQ ID NO

9.54.1 GCNIMLPFWGCGQSFECLAGCVCQYYQSCG 99

150 17800220_1 (GHMaters) P108077.AU.1

9.54.1-2 GCNIMLPFWGCGQSFECLAGCICQYYQSCGIA 477 9.54.1-63 GCNIMLPFWGCGQSFECLAGCICQYYQSCGGS 478

9.54.1-36 GCNIMLPFWGCGQSFECLAGCICQYYQSCGTR 479 9.54.1-42 GCNIMLPFWGCGQSFECLAGCICQYYQSCGLS 533

9.54.1-90 GCNIMLPFWGCGQSFECLAGCICQYYQSCGVH 480

[04141 Clone 9.54-28 (in Table 39) showed approximately 10-fold improved binding affinity for hVEGF-A (8-109) compared to 9.54, as determined by phage competition ELISA (described above). (See FIG. 15). Clones 9.54.1-2, 9.54.1-36, 9.54.1-42, 9.54.1-63, and 9.54.1-90 (in Table 40) also showed approximately 10-fold improved binding affinity for hVEGF-A (8-109) compared to 9.54.1, as determined by phage competition ELISA. (See FIG. 15).

[0415] Peptides 9.63 (SEQ ID NO: 55), and 9.63.44 (SEQ ID NO: 125) were selected for further modification as described above. New phage libraries based on these frameworks were generated in which two additional amino acids were added to their C-termini.

[0416] From the 9.63 library, 28 clones whose binding signals for hVEGF-A (8-109) were more than 3 times higher than to BSA (background) were identified (Table 41). These hits contained variations in amino acid composition within loops 2 and 4.

Table 41: C-terminal Two-residue Extension Variants Based on 9.63

CLONE ID AMINO ACID SEQUENCE SEQ ID NO

9.63 GCDVMQPYWGCKQDSDCLAGCVCHWYNSCG 55 9.63-1 GCDVMQPYWGCKQDFDCLAGCVCHWYNSCGPS 481 9.63-4 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGFS 482 9.63-7 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGGK 483 9.63-10 GCDVMQPYWGCKQDFDCLAGCICHWYNSCGYL 484 9.63-16 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGDL 485

9.63-17 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGEK 486

9.63-19 GCDVMQPYWGCKQDSDCLAGCICHWYNSCGTD 487 9.63-20 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGQV 488 9.63-21 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGRL 489

9.63-22 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGYA 490

9.63-23 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGAS 491 9.63-25 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGSR 492

151 17800220_1 (GHMaters) P108077.AU.1

9.63-30 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGPT 493

9.63-36 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGSL 456 9.63-40 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGWD 494

9.63-45 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGSM 495 9.63-61 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGTR 496

9.63-62 GCDVMQPYWGCKQDSDCLAGCVCHWYNSCGEN 497 9.63-65 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGNN 498

9.63-66 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGPE 499

9.63-67 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGGI 500 9.63-68 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGVE 501

9.63-70 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGPL 503

9.63-72 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGTS 527 9.63-74 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGRP 504

9.63-77 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGND 505

9.63-79 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGLQ 506 9.63-93 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGDE 507

[04171 From the 9.63.44 library, 17 clones whose binding signals for hVEGF-A (8-109) were more than 3 times higher than to BSA (background) were identified (Table 42). These hits contained a variation in amino acid composition within loop 4. Clone 9.63.44-55 contained a variation in amino acid composition within loop 2, and clone 9.63.44-10 contained a variation in amino acid composition within loop 3. Interestingly clone 9.63.44 12 in Table 42 and clone 9.63-70 in Table 41 have the same amino acid sequence.

Table 42: C-terminal Two-residue Extension Variants Based on 9.63.44

CLONE ID AMINO ACID SEQUENCE SEQ ID NO

9.63.44 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCG 125 9.63.44-2-A GCDVMQPYWGCEMDFDCLAGCICHWYNSCGRT 508

9.63.44-55 GCDVMQPYWGCEIDFDCLAGCVCHWYNSCGQV 509 9.63.44-10-A GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGGI 510 9.63.44-54 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGYM 511 9.63.44-19 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGGQ 512 9.63.44-44 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGTP 513 9.63.44-14 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGVN 514 9.63.44-73 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGFN 515

152 17800220_1 (GHMaters) P108077.AU.1

9.63.44-16 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGEP 516

9.63.44-80 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGNS 517

9.63.44-41 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGST 518

9.63.44-82 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGRY 519

9.63.44-1 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGFS 520

9.63.44-2 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGQV 521

9.63.44-3 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGYA 522

9.63.44-4 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGSR 523

9.63.44-5 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGPT 524

9.63.44-6 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGSM 525

9.63.44-7 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGGI 526

9.63.44-8 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGTS 527

9.63.44-9 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGLQ 528

9.63.44-10 GCDVMQPYWGCEMDFDCLVGCVCHWYNSCGDE 529

9.63.44-11 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGDL 530

9.63.44-12 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGPL 503

9.63.44-13 GCDVMQPYWGCEMDFDCLAGCVCHWYNSCGQF 531

9.63.44-14 GCDVMQPYWGCEMDFDCLAGCICHWYNSCGWK 532

[04181 Clones 9.63.44-1 through 9.63.44-14 (in Table 42) showed improved binding affinity for hVEGF-A (8-109) compared to 9.63.44, as determined by phage competition ELISA. (See FIGS. 16A and 16B).

[0419] Taken together, the results above indicate that extending lead peptides 9.54 (SEQ ID NO: 52), 9.54.1 (SEQ ID NO: 99), 9.63 (SEQ ID NO: 55), and 9.63.44 by adding two amino acids to their C-termini produced variants having -10-fold greater binding affinity for hVEGF-A (8-109).

[0420] Next, peptides 9.54.90 (SEQ ID NO: 102) and 63.12.12.M5L (SEQ ID NO: 386) were selected for further modification as described above. Briefly new phage libraries were generated based on 9.54.90 in which two additional amino acids, three additional amino acids, or four additional amino acids were added at the C-terminus. A second set of libraries was generated based on 63.12.12.M5L in which two additional amino acids were added at the C-terminus.

[0421] From the 9.54.90 libraries comprising 2-amino acid C-terminal extensions, 6 clones whose binding signals for hVEGF-A (8-109) were more than 3 times higher than to BSA (background) were identified (Table 43).

Table 43: C-terminal Two-residue Extension Variants Based on 9.54.90

CLONE ID AMINO ACID SEQUENCE SEQ ID NO

9.54.90 GCNIMLPFWGCGRDFECLAGCVCQYYQSCG 102

9.54.90-2x28 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGFH 379

9.54.90-2x2 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGIA 380 9.54.90-2x63 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGGS 381

9.54.90-2x36 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGTR 382 9.54.90-2x90 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGVH 383 9.54.90-2x42 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGLS 384

[0422] From the 9.54.90 libraries comprising 3-amino acid C-terminal extensions, 10 clones whose binding signals for hVEGF-A (8-109) were more than 3 times higher than to BSA (background) were identified (Table 44).

Table 44: C-terminal Three-residue Extension Variants Based on 9.54.90

CLONE ID AMINO ACID SEQUENCE SEQ ID NO

9.54.90 GCNIMLPFWGCGRDFECLAGCVCQYYQSCG 102

9.54.90-3X83 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGPLI 369 9.54.90-3X50 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGNYQ 370 9.54.90-3x49 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGPLQ 371

9.54.90-3x10 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGTFQ 372 9.54.90-3x91 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGDLV 373 9.54.90-3x42 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGEHK 374 9.54.90-3x88 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGYLS 375

9.54.90-3x9 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGWDY 376 9.54.90-3x13 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGWPH 377 9.54.90-3x33 GCNIMLPFWGCGRDFECLAGCVCQYYQSCGPHQ 378

[04231 All peptides from the 9.54.90 libraries comprising 4-amino acid C-terminal extensions, contained 3amino acid C-terminal extensions.

154 17800220_1 (GHMaters) P108077.AU.1

[04241 From the 63.12.12.M5L libraries comprising 2-amino acid C-terminal extensions, 9 clones whose binding signals for hVEGF-A (8-109) were more than 3 times higher than to BSA (background) were identified (Table 45).

Table 45: C-terminal Two-residue Extension Variants Based on 63.12.12.M5L

CLONE ID AMINO ACID SEQUENCE SEQ ID NO

63.12.12.M5L GCDVLQPYWGCGPDIDCLSNCICHWYNSCG 386

63.12.12.M5L.2x2 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGRT 387

63.12.12.M5L.2x77 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGWK 388

63.12.12.M5L.2x48 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGPL 389

63.12.12.M5L.2x25 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGDE 390

63.12.12.M5L.2x69 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGQF 391

63.12.12.M5L.2x12 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGEQ 392

63.12.12.M5L.2x30 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGPT 393

63.12.12.M5L.2x21 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGRL 394

63.12.12.M5L.2x29 GCDVLQPYWGCGPDIDCLSNCICHWYNSCGSL 395

Example 2C: Characterizationof VEGF-A-binding non-naturallyoccurringEETI-H variants comprising C-terminalamino acid extensions

[04251 The variants provided in Tables 43-45 above are assayed via phage competition ELISA as described above to identify variants with greater binding affinity for hVEGF-A (8 109).

[0426] Clones (e.g., such as those provided in Tables 39-45) demonstrating greater affinity for hVEGF (8-109), including, e.g., 9.54.1-2, 9.54.1-36, 9.54.1-42, 9.54.1-63, and 9.54.1-90, and 9.63.44-1 - 9.63.44-14, are then selected for further in vitro assessments, such as inhibitory activity in phage competition ELISAs and VEGF-KDR interaction ELISAs, as described above.

[04271 Clones are then analyzed via surface plasmon resonance to determine their affinities for various VEGF isoforms, including hVEGF-A (8-109), hVEGF-A 165, mouse VEGF-A 164, rat VEGF-A, and rabbit VEGF-A.

155 17800220_1 (GHMaters) P108077.AU.1

[04281 Further analyses are performed to assess the clones specificity for VEGF-A. For example, competition ELISAs are performed as described above with VEGF-A, VEGF-B, VEGF-C, VEGF-D, PlGf-2, NGF, EGF, PDGF-p, or IGF-1.

[0429] The clones are also assayed for their abilities to inhibit trypsin protease activity as measured in a peptide substrate cleavage assay (Stanger et al. (2014) FEBS Lett. 588 (23), 4487-96).

[0430] Binding kinetics and affinities of the clones for various hVEGF mutants, including, e.g., Y21A, K48A, Q89A, and F17A/M81A, are determined as described above.

[0431] Next, the clones are assessed for their in vivo efficacy in a VEGF-A driven model of choroidal neovascularization, as described above.

[04321 The oxidative stability of the variants is assayed as described above.

Example 3: GenerationofNon-naturally OccurringEETI-H variants that bind LRP6

[0433] The nave EETI-II libraries described in Example 2A were cycled through rounds of selection against LRP6 ElE2 protein. Twenty-two unique clones were identified which bound LRP6 E1E2 (Table 46). These initial hits contained variations in amino acid content within loops 1 and 5. In several variants, loop 1 exhibited a longer length compared to that of the native EETI-1I framework. Notably, the newly evolved sequences that bound to LRP6 contained a consensus motif in loop 1 (NXI) that is similar to a motif (NAI) present within the native Dkkl molecules which are endogenous LRP6 ligands. The newly evolved variants recapitulated a motif which occurs in natural ligands.

Table 46: EETI-II-based binders against LRP6 E1E2

VARIANT LOOP 1 LOOP 5 ELISA S/N*

LRP6 CKP1 RTNRVKGG GPNGF 3.23 45.49 - (SEQ ID NO: 147) (SEQ ID NO: 19)

LRP6_CKP2 VNRVRG SGGRD 3.41 41.62 (SEQ ID NO: 148) (SEQ ID NO: 169)

LRP6_CKP3 MNHVKARR GPNGF 2.93 40.18 (SEQ ID NO: 149) (SEQ ID NO: 19)

LRP6 - CKP4 RSVNKI GSSRN 2.82 25.39 (SEQ ID NO: 150) (SEQ ID NO: 170)

LRP6_CKP5 VNKIKG GVEGR 3.04 35.71 (SEQ ID NO: 151) (SEQ ID NO: 171)

LRP6 CKP6 RNSIKR (SEQ SVGHG 3.10 37.36 ID NO: 152) (SEQ ID NO: 172)

LRP6_CKP7 VSNRVNKG GPNGF 3.30 28.96

156 17800220_1 (GHMaters) P108077.AU.1

(SEQ ID NO: 153) (SEQ ID NO: 19)

LRP6_CKP8 RGNIIK NESRG 3.23 37.56 (SEQ ID NO: 154) (SEQ ID NO: 173)

LRP6_CKP9 RSGNTIRKRE GGPGG 2.97 37.62 (SEQ ID NO: 155) (SEQ ID NO: 174)

LRP6 CKP10 ASSNSIRQGW GPKSN 3.29 3.3 (SEQ ID NO: 156) (SEQ ID NO: 175)

LRP6_CKP11 RSNRIR YGHGD 2.65 36.76 (SEQ ID NO: 157) (SEQ ID NO: 176)

LRP6_CKP12 RSNKLREARG GSRQD 0.60 6.78 (SEQ ID NO: 158) (SEQ ID NO: 177)

LRP6 CKP13 VNSVKR SRGVN 3.28 37.75 (SEQ ID NO: 159) (SEQ ID NO: 178)

LRP6_CKP14 GSNKIRPR GPNDF 3.18 43.53 (SEQ ID NO: 160) (SEQ ID NO: 179)

LRP6_CKP15 NRIRNS GRGDY 2.03 26.31 (SEQ ID NO: 161) (SEQ ID NO: 180)

LRP6 CKP16 SRNSIK ASGSS 33 11 (SEQ ID NO: 162) (SEQ ID NO: 181) 3.36 31.11

LRP6_CKP17 SNYVKR SPGGR 3.09 35.88 (SEQ ID NO: 163) (SEQ ID NO: 182)

LRP6_CKP18 RANRVSGR GPNGF 1.67 18.32 (SEQ ID NO: 164) (SEQ ID NO: 19)

LRP6_CKP19 SNRVKVRA GPNGF 3.27 41.96 (SEQ ID NO: 165) (SEQ ID NO: 19)

LRP6_CKP20 ENRTKG GFRGT 3.10 38.69 (SEQ ID NO: 166) (SEQ ID NO: 183)

LRP6 CKP21 GNKIRA RDRVG 2.80 33.69 (SEQ ID NO: 167) (SEQ ID NO: 184)

LRP6_CKP22 ANRVKRTS GPNGF 3.4 4.86 (SEQ ID NO: 168) (SEQ ID NO: 19)

*S/N = signal to noise ratio as compared to BSA control

[04341 The extracellular domain of the LRP6 consists of four propeller domains (El-E4) that interact with Frizzled receptors and Wnt proteins to propagate Wnt signaling. Utilizing a modular approach, LRP6 distinguishes between Wntl or Wnt3a signaling through selective binding of either its El-E2 or E3-E4 domains to specific Wnt isoforms, respectively (Hannoush et al. (2010) J Biol. Chem. 285, 9172-9179). To pharmacologically delineate Wntl and Wnt3a signaling arms, we sought to identify ligands that bind selectively to LRP6 El-E2.

[0435] Of the identified sequences, RI, LRP6_CKP6 and LRP6_CKP19 were generated in soluble folded form in order to test their pharmacological activity against either Wntl or Wnt3a signaling. As shown in Tables 47 and 48 below, no significant selectivity was observed by R77 towards Wntl or Wnt3a in a cell-based signaling reporter assay. On the other hand, RI and R19 showed selective inhibition towards Wntl signaling relative to Wnt3a (160-fold and 11-fold for Wntl over Wnt3a, respectively) as measured in a luciferase reporter assay, supporting the notion that these variants do not target the LRP6 E3-E4 domains (IC50> 44 gM). Altogether, the data highlight the specificity of the newly evolved variants and their effects in mimicking a motif which occurs in natural ligands. More importantly, the identified variants provide a pharmacological means to interrogate Wntl and Wnt3 signaling.

Table 47: Inhibitory activity of LRP6-binding CKP variants against Wntl signaling

Lrp6-CKP Best Fit IC50 (nM) for 95% confidence interval (n=4) Wntl (5ng/well) (nM) R1 F1 241.7 185.8 to 314.5 RI F2 193.8 140.1 to 268.2 LRP6_CKP6 F1 22,866 13,593 to 38,463

LRP6 CKP6 F2 23,760 14,458 to 39,046 LRP6 CKP6 F3 4,625 3,037 to 7,044

LRP6 CKP19 F1 23,132 15,397 to 34,754 LRP6 CKP19 F2 49,330 31,391 to 77,520

Table 48: Inhibitory activity of LRP6-binding CKP variants against Wnt3a signaling

Lrp6-CKP Best Fit IC50 (nM) for 95% confidence interval (n=4) Wnt3a (25ng/well) (nM) RI F1 38,594 16,093 to 92,554 RI F2 16,596 9,037 to 30,478 LRP6 CKP6 F1 350,240 11840 to 1.036x10 7

LRP6_CKP6 F2 275,584 24,695 to 3.075x106 LRP6 CKP6 F3 Not converge Not converge LRP6 CKP19 F1 59,287 32,600 to 107,823 LRP6_CKP19 F2 69,827 26,179 to 186,252

[04361 F1, F2, and F3 in Tables 47 and 48 refer to peak fractions 1, 2, and 3, respectively that were obtained during the purification of R, LRP6_CKP6, and LRP6_CKP19.

158 17800220_1 (GHMaters) P108077.AU.1

The preceding Examples are offered for illustrative purposes only, and are not intended to limit the scope of the present invention in any way. Various modifications of the invention in addition to those shown and described herein will become apparent to those skilled in the art from the foregoing description and fall within the scope of the appended claims.

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SEQUENCE LISTING

<110> Genentech, Inc. <120> CYSTINE KNOT SCAFFOLD PLATFORM

<130> 146392026840 <150> US 62/219,063 <151> 2015-09-15 2021204400

<160> 568 <170> FastSEQ for Windows Version 4.0 <210> 1 <211> 28 <212> PRT <213> Ecballium elaterium <400> 1 Gly Cys Pro Arg Ile Leu Met Arg Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25

<210> 2 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1, 2, 3, 4, 5, 6 <223> Xaa = Any Amino Acid

<400> 2 Xaa Xaa Xaa Xaa Xaa Xaa 1 5

<210> 3 <211> 7 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 1, 2, 3, 4, 5, 6, 7 <223> Xaa = Any Amino Acid <400> 3 Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5

<210> 4 <211> 8 <212> PRT Page 1

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<213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1, 2, 3, 4, 5, 6, 7, 8 <223> Xaa = Any Amino Acid <400> 4 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 2021204400

1 5

<210> 5 <211> 9 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 1, 2, 3, 4, 5, 6, 7, 8, 9 <223> Xaa = Any Amino Acid

<400> 5 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5

<210> 6 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 <223> Xaa = Any Amino Acid <400> 6 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5 10

<210> 7 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1, 2, 3, 4, 5 <223> Xaa = any amino acid or an unnatural amino acid <400> 7 Xaa Xaa Xaa Xaa Xaa 1 5

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<220> <223> Synthetic Construct <400> 8 Pro Thr Thr Arg Phe Lys Gln Tyr 1 5 2021204400

<210> 9 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 9 Gln Asp Pro Thr Phe Asn Trp Ala Leu Tyr 1 5 10

<210> 10 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 10 Gln Leu Met Gln Pro Phe Trp Gly 1 5

<210> 11 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 11 Arg Asp Leu Asp Val Lys Trp Asp 1 5

<210> 12 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 12 Arg Thr Pro Trp Glu Pro His Asp Ile Thr 1 5 10

<210> 13 <211> 10 Page 3

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<220> <223> Synthetic Construct

<400> 13 Thr Thr Pro Trp Pro Pro His Glu Ile Met 1 5 10

<210> 14 2021204400

<211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 14 Val Thr Pro Trp Lys Pro His Trp Ile Asn 1 5 10

<210> 15 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 15 Gly Pro Asn Gly Phe 1 5

<210> 16 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 16 Gln Met Tyr Gln Ser 1 5

<210> 17 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 17 His Trp Tyr Gln Ser 1 5

<210> 18 <211> 5 <212> PRT <213> Artificial Sequence

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<220> <223> Synthetic Construct

<400> 18 Gln Tyr Tyr Ser Ser 1 5

<210> 19 <211> 5 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 19 Gly Pro Asn Gly Phe 1 5

<210> 20 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = G or E or Y or Q or H <220> <221> VARIANT <222> 2 <223> Xaa = P or M or W or Y

<220> <221> VARIANT <222> 3 <223> Xaa = N or Y or W

<220> <221> VARIANT <222> 4 <223> Xaa = G or D or T or Q or R or S

<220> <221> VARIANT <222> 5 <223> Xaa = F or A or E or S <400> 20 Xaa Xaa Xaa Xaa Xaa 1 5

<210> 21 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 21 Page 5

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Gly Cys Pro Thr Thr Arg Phe Lys Gln Tyr Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 22 <211> 32 <212> PRT <213> Artificial Sequence <220> 2021204400

<223> Synthetic Construct <400> 22 Gly Cys Gln Asp Pro Thr Phe Asn Trp Ala Leu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Tyr Gln Ser Cys Gly 20 25 30

<210> 23 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 23 Gly Cys Gln Leu Met Gln Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 24 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 24 Gly Cys Arg Asp Leu Asp Val Lys Trp Asp Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Phe Cys Gln Tyr Tyr Ser Ser Cys Gly 20 25 30

<210> 25 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 25 Gly Cys Arg Thr Pro Trp Glu Pro His Asp Ile Thr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 26 <211> 32 Page 6

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<220> <223> Synthetic Construct

<400> 26 Gly Cys Thr Thr Pro Trp Pro Pro His Glu Ile Met Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30 2021204400

<210> 27 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 27 Gly Cys Val Thr Pro Trp Lys Pro His Trp Ile Asn Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 28 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 28 Asp Val Leu Gln Pro Phe Trp Gly 1 5

<210> 29 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 29 Gln Ile Ser Gln Pro Phe Trp Gly 1 5

<210> 30 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 30 Asp Arg Met Gln Pro Leu Trp Gly 1 5

<210> 31 Page 7

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<211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 31 Asn Leu Met Leu Pro Phe Trp Gly 1 5 2021204400

<210> 32 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 32 Gln Arg Thr Gln Pro Phe Trp Gly 1 5

<210> 33 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 33 Asn Ile Met Leu Pro Phe Trp Gly 1 5

<210> 34 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 34 Asp Pro Met Gln Pro Phe Trp Gly 1 5

<210> 35 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 35 Asp Val Met Gln Pro Tyr Trp Gly 1 5

<210> 36 <211> 8 <212> PRT <213> Artificial Sequence Page 8

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<220> <223> Synthetic Construct <400> 36 Asp Ile Met Gln Pro Leu Trp Gly 1 5

<210> 37 <211> 8 <212> PRT 2021204400

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 37 Gln Leu Leu Gln Pro Leu Trp Gly 1 5

<210> 38 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 38 Asn Pro Met Leu Pro Leu Trp Gly 1 5

<210> 39 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 39 Lys Leu Phe Glu Pro Leu Trp Gly 1 5

<210> 40 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = Q or D or K or N or A or R or H <220> <221> VARIANT <222> 2 <223> Xaa = L or V or I or R or P or V <220> <221> VARIANT Page 9

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<222> 3 <223> Xaa = M or L or S or T or F

<220> <221> VARIANT <222> 4 <223> Xaa = Q or E or L or H <220> <221> VARIANT <222> 6 <223> Xaa = F or L or M or Y or S 2021204400

<400> 40 Xaa Xaa Xaa Xaa Pro Xaa Trp Gly 1 5

<210> 41 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 41 His Phe Tyr Asn Ser 1 5

<210> 42 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 42 Leu Trp Tyr Lys Ser 1 5

<210> 43 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 43 Arg Trp Tyr His Ser 1 5

<210> 44 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 44 Arg Trp Tyr Gln Ser 1 5 Page 10

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<210> 45 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 45 Gln Tyr Tyr Gln Ser 2021204400

1 5

<210> 46 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 46 His Trp Tyr Asn Ser 1 5

<210> 47 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 47 Gly Cys Asp Val Leu Gln Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 48 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 48 Gly Cys Gln Ile Ser Gln Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Phe Tyr Asn Ser Cys Gly 20 25 30

<210> 49 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 49 Gly Cys Asp Arg Met Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp Page 11

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1 5 10 15 Cys Leu Ala Gly Cys Val Cys Leu Trp Tyr Lys Ser Cys Gly 20 25 30

<210> 50 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 50 Gly Cys Asn Leu Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr His Ser Cys Gly 20 25 30

<210> 51 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 51 Gly Cys Gln Arg Thr Gln Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 52 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 52 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 53 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 53 Gly Cys Asn Pro Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 54 <211> 30 <212> PRT Page 12

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<213> Artificial Sequence <220> <223> Synthetic Construct <400> 54 Gly Cys Asp Pro Met Gln Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Gln Ser Cys Gly 20 25 30 2021204400

<210> 55 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 55 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 56 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 56 Gly Cys Asp Ile Met Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 57 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 57 Gly Cys Gln Leu Leu Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 58 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 58 Gly Cys Asn Pro Met Leu Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Page 13

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Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 59 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 59 Gly Cys Lys Leu Phe Glu Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Glu Ser Cys Gly 20 25 30

<210> 60 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 60 Lys Asn Pro Leu Phe Asn Trp Ala Leu Tyr 1 5 10

<210> 61 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 61 Gln Asp Pro Thr Val Asn Trp Ala Val Tyr 1 5 10

<210> 62 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 62 Gln Asp Pro Thr Phe Asn Trp Ala Glu Tyr 1 5 10

<210> 63 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 63 Gln Asp Pro Ser Leu Asn Trp Ala Asp Tyr Page 14

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1 5 10

<210> 64 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 64 2021204400

Leu Asp Arg Thr Leu Asn Trp Ala Leu Tyr 1 5 10

<210> 65 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 65 Leu Asp Pro Ser Phe Asn Trp Ser Leu Tyr 1 5 10

<210> 66 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 66 Arg Asp Leu Thr Ile Asn Trp Ala Leu Phe 1 5 10

<210> 67 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 67 Leu Asp Pro Thr Val Asn Trp Ala Leu Phe 1 5 10

<210> 68 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 68 Gln Asp Pro Lys Leu Asn Trp Ala Val Tyr 1 5 10

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<210> 69 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 69 Leu Asp Pro Ser Phe Asp Trp Ala Leu Tyr 1 5 10 2021204400

<210> 70 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = Q or D or K or W or E or L or R

<220> <221> VARIANT <222> 2 <223> Xaa = D or N

<220> <221> VARIANT <222> 3 <223> Xaa = P or R or L or T

<220> <221> VARIANT <222> 4 <223> Xaa = T or S or L or K <220> <221> VARIANT <222> 5 <223> Xaa = F or V or L or I <220> <221> VARIANT <222> 6 <223> Xaa = N or D <220> <221> VARIANT <222> 8 <223> Xaa = A or S or G <220> <221> VARIANT <222> 9 <223> Xaa = L or V or E or T or Q or D <220> <221> VARIANT <222> 10 <223> Xaa = F or Y <400> 70 Xaa Xaa Xaa Xaa Xaa Xaa Trp Xaa Xaa Xaa Page 16

146392026840SEQLIST.TXT 28 Jun 2021

1 5 10

<210> 71 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 71 2021204400

Gln Leu Phe Asp Ser 1 5

<210> 72 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 72 Gln Phe Tyr Gln Ser 1 5

<210> 73 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 73 Gln Leu Tyr Gln Ser 1 5

<210> 74 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 74 Gln Met His Gln Ser 1 5

<210> 75 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 75 Gln Met Tyr Asn Ser 1 5

Page 17

146392026840SEQLIST.TXT 28 Jun 2021

<210> 76 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 76 Gln Met Tyr Asp Ser 1 5 2021204400

<210> 77 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 77 Gln His Tyr Lys Thr 1 5

<210> 78 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 78 Gln Leu Phe Asn Ser 1 5

<210> 79 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 79 Gln Leu Tyr Asn Ser 1 5

<210> 80 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = Q or R <220> <221> VARIANT <222> 2 Page 18

146392026840SEQLIST.TXT 28 Jun 2021

<223> Xaa = M or L or F or H <220> <221> VARIANT <222> 3 <223> Xaa = Y or F or H

<220> <221> VARIANT <222> 4 <223> Xaa = D or Q or N or K 2021204400

<220> <221> VARIANT <222> 5 <223> Xaa = S or T <400> 80 Xaa Xaa Xaa Xaa Xaa 1 5

<210> 81 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 81 Gly Cys Lys Asn Pro Leu Phe Asn Trp Ala Leu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Leu Phe Asp Ser Cys Gly 20 25 30

<210> 82 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 82 Gly Cys Gln Asp Pro Thr Val Asn Trp Ala Val Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Phe Tyr Gln Ser Cys Gly 20 25 30

<210> 83 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 83 Gly Cys Gln Asp Pro Thr Phe Asn Trp Ala Glu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Leu Tyr Gln Ser Cys Gly 20 25 30

<210> 84 Page 19

146392026840SEQLIST.TXT 28 Jun 2021

<211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 84 Gly Cys Gln Asp Pro Thr Phe Asn Trp Ala Glu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Tyr Gln Ser Cys Gly 20 25 30 2021204400

<210> 85 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 85 Gly Cys Gln Asp Pro Ser Leu Asn Trp Ala Asp Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met His Gln Ser Cys Gly 20 25 30

<210> 86 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 86 Gly Cys Leu Asp Arg Thr Leu Asn Trp Ala Leu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Tyr Asn Ser Cys Gly 20 25 30

<210> 87 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 87 Gly Cys Leu Asp Pro Ser Phe Asn Trp Ser Leu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Tyr Asp Ser Cys Gly 20 25 30

<210> 88 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 88 Page 20

146392026840SEQLIST.TXT 28 Jun 2021

Gly Cys Arg Asp Leu Thr Ile Asn Trp Ala Leu Phe Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Phe Asn Ser Cys Gly 20 25 30

<210> 89 <211> 32 <212> PRT <213> Artificial Sequence <220> 2021204400

<223> Synthetic Construct <400> 89 Gly Cys Leu Asp Pro Thr Val Asn Trp Ala Leu Phe Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln His Tyr Lys Thr Cys Gly 20 25 30

<210> 90 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 90 Gly Cys Gln Asp Pro Lys Leu Asn Trp Ala Val Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Leu Phe Asn Ser Cys Gly 20 25 30

<210> 91 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 91 Gly Cys Leu Asp Pro Ser Phe Asp Trp Ala Leu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Leu Tyr Asn Ser Cys Gly 20 25 30

<210> 92 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 92 Pro Arg Ile Leu Met Arg 1 5

<210> 93 <211> 5 <212> PRT <213> Artificial Sequence Page 21

146392026840SEQLIST.TXT 28 Jun 2021

<220> <223> Synthetic Construct <400> 93 Lys Gln Asp Ser Asp 1 5

<210> 94 <211> 5 <212> PRT 2021204400

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 94 Gly Gln Ser Phe Glu 1 5

<210> 95 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 95 Gly Leu Asp Tyr Asp 1 5

<210> 96 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 96 Gly Pro Asp Leu Gln 1 5

<210> 97 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 97 Gly Arg Asp Phe Glu 1 5

<210> 98 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 22

146392026840SEQLIST.TXT 28 Jun 2021

<220> <221> VARIANT <222> 1 <223> Xaa = K or G or Q or S or N

<220> <221> VARIANT <222> 2 <223> Xaa = Q or L or P or A or V or T or R or W or K or G or Y <220> 2021204400

<221> VARIANT <222> 3 <223> Xaa = D or S or E or N <220> <221> VARIANT <222> 4 <223> Xaa = S or F or Y or L or F or Q or M <220> <221> VARIANT <222> 5 <223> Xaa = D or E or N or A or L or F or H or Q

<400> 98 Xaa Xaa Xaa Xaa Xaa 1 5

<210> 99 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 99 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Gln Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 100 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 100 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Leu Asp Tyr Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 101 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 23

146392026840SEQLIST.TXT 28 Jun 2021

<400> 101 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Pro Asp Leu Gln 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 102 <211> 30 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 102 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 103 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 103 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Gln Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 104 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 104 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Glu Arg Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 105 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 105 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Ser Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

Page 24

146392026840SEQLIST.TXT 28 Jun 2021

<210> 106 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 106 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Asn Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 2021204400

20 25 30

<210> 107 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 107 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Gln Thr Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 108 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 108 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Tyr Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 109 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 109 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Phe Ile Asn Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 110 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

Page 25

146392026840SEQLIST.TXT 28 Jun 2021

<400> 110 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Ser Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 111 <211> 30 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 111 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Thr Glu Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 112 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 112 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Phe Tyr Glu Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 113 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 113 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 114 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 114 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Tyr Arg Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 115 Page 26

146392026840SEQLIST.TXT 28 Jun 2021

<211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = K or P or Q or R 2021204400

<220> <221> VARIANT <222> 2 <223> Xaa = K or T or L or D <220> <221> VARIANT <222> 3 <223> Xaa = W or T or M or L <220> <221> VARIANT <222> 4 <223> Xaa = Q or R or D

<220> <221> VARIANT <222> 5 <223> Xaa = W or F or P or V

<220> <221> VARIANT <222> 6 <223> Xaa = W or K or F

<220> <221> VARIANT <222> 7 <223> Xaa = Y or Q or W

<220> <221> VARIANT <222> 8 <223> Xaa = M or Y or G or D

<400> 115 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5

<210> 116 <400> 116 000

<210> 117 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 117 Gly Glu Asn Phe Leu Page 27

146392026840SEQLIST.TXT 28 Jun 2021

1 5

<210> 118 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 118 2021204400

Gly Pro Asp Ile Asp 1 5

<210> 119 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 119 Gly Arg Asp Met Asp 1 5

<210> 120 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 120 Glu Met Asp Phe Asp 1 5

<210> 121 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = K or G or D or A or E <220> <221> VARIANT <222> 2 <223> Xaa = Q or E or R or V or P or D or M or G or N or L or A or F <220> <221> VARIANT <222> 3 <223> Xaa = D or N or Y or S <220> <221> VARIANT Page 28

146392026840SEQLIST.TXT 28 Jun 2021

<222> 4 <223> Xaa = S or F or L or I or M or Y or V or N or E

<220> <221> VARIANT <222> 5 <223> Xaa = D or L or Q or S or E or T or L or A or N <400> 121 Xaa Xaa Xaa Xaa Xaa 1 5 2021204400

<210> 122 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 122 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Glu Asn Phe Leu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 123 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 123 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 124 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 124 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Arg Asp Met Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 125 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 125 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp Page 29

146392026840SEQLIST.TXT 28 Jun 2021

1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 126 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 126 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Glu Ser Leu Ser 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 127 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 127 Asp Val Met Lys Pro Met Trp Gly 1 5

<210> 128 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 128 Asp Val Leu Asp Pro Thr Trp Gly 1 5

<210> 129 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 129 Asp Val Leu Gln Pro Leu Trp Gly 1 5

<210> 130 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> Page 30

146392026840SEQLIST.TXT 28 Jun 2021

<221> VARIANT <222> 3 <223> Xaa = M or L <220> <221> VARIANT <222> 4 <223> Xaa = Q or K or D <220> <221> VARIANT <222> 6 2021204400

<223> Xaa = Y or M or T or L <400> 130 Asp Val Xaa Xaa Pro Xaa Trp Gly 1 5

<210> 131 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 131 Gln Trp Tyr Asn Ser 1 5

<210> 132 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 132 Leu Trp Tyr Asn Ser 1 5

<210> 133 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 133 Arg Trp Tyr Asn Ser 1 5

<210> 134 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT Page 31

146392026840SEQLIST.TXT 28 Jun 2021

<222> 1 <223> Xaa = H or L or Q or R

<400> 134 Xaa Trp Tyr Asn Ser 1 5

<210> 135 <211> 30 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 135 Gly Cys Asp Val Met Lys Pro Met Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 136 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 136 Gly Cys Asp Val Leu Asp Pro Thr Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Leu Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 137 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 137 Gly Cys Asp Val Leu Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 138 <400> 138 000

<210> 139 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 139 Page 32

146392026840SEQLIST.TXT 28 Jun 2021

Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Phe Val Arg Cys Leu Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 140 <211> 30 <212> PRT <213> Artificial Sequence <220> 2021204400

<223> Synthetic Construct <400> 140 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 141 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 141 Asn Ile Met Leu Pro Tyr Trp Gly 1 5

<210> 142 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 142 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 143 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 3 <223> Xaa = norleucine <400> 143 Asn Ile Xaa Leu Pro Tyr Trp Gly 1 5

<210> 144 Page 33

146392026840SEQLIST.TXT 28 Jun 2021

<211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine 2021204400

<400> 144 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Ser Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 145 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<400> 145 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Ser Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 146 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 146 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 147 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 147 Page 34

146392026840SEQLIST.TXT 28 Jun 2021

Arg Thr Asn Arg Val Lys Gly Gly 1 5

<210> 148 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 148 Val Asn Arg Val Arg Gly 1 5

<210> 149 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 149 Met Asn His Val Lys Ala Arg Arg 1 5

<210> 150 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 150 Arg Ser Val Asn Lys Ile 1 5

<210> 151 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 151 Val Asn Lys Ile Lys Gly 1 5

<210> 152 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 152 Arg Asn Ser Ile Lys Arg 1 5

Page 35

146392026840SEQLIST.TXT 28 Jun 2021

<210> 153 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 153 Val Ser Asn Arg Val Asn Lys Gly 1 5 2021204400

<210> 154 <211> 6 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 154 Arg Gly Asn Ile Ile Lys 1 5

<210> 155 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 155 Arg Ser Gly Asn Thr Ile Arg Lys Arg Glu 1 5 10

<210> 156 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 156 Ala Ser Ser Asn Ser Ile Arg Gln Gly Trp 1 5 10

<210> 157 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 157 Arg Ser Asn Arg Ile Arg 1 5

<210> 158 <211> 10 Page 36

146392026840SEQLIST.TXT 28 Jun 2021

<212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 158 Arg Ser Asn Lys Leu Arg Glu Ala Arg Gly 1 5 10

<210> 159 2021204400

<211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 159 Val Asn Ser Val Lys Arg 1 5

<210> 160 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 160 Gly Ser Asn Lys Ile Arg Pro Arg 1 5

<210> 161 <211> 6 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 161 Asn Arg Ile Arg Asn Ser 1 5

<210> 162 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 162 Ser Arg Asn Ser Ile Lys 1 5

<210> 163 <211> 6 <212> PRT <213> Artificial Sequence

Page 37

146392026840SEQLIST.TXT 28 Jun 2021

<220> <223> Synthetic Construct

<400> 163 Ser Asn Tyr Val Lys Arg 1 5

<210> 164 <211> 8 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 164 Arg Ala Asn Arg Val Ser Gly Arg 1 5

<210> 165 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 165 Ser Asn Arg Val Lys Val Arg Ala 1 5

<210> 166 <211> 6 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 166 Glu Asn Arg Thr Lys Gly 1 5

<210> 167 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 167 Gly Asn Lys Ile Arg Ala 1 5

<210> 168 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

Page 38

146392026840SEQLIST.TXT 28 Jun 2021

<400> 168 Ala Asn Arg Val Lys Arg Thr Ser 1 5

<210> 169 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 169 Ser Gly Gly Arg Asp 1 5

<210> 170 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 170 Gly Ser Ser Arg Asn 1 5

<210> 171 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 171 Gly Val Glu Gly Arg 1 5

<210> 172 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 172 Ser Val Gly His Gly 1 5

<210> 173 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 173 Asn Glu Ser Arg Gly 1 5 Page 39

146392026840SEQLIST.TXT 28 Jun 2021

<210> 174 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 174 Gly Gly Pro Gly Gly 2021204400

1 5

<210> 175 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 175 Gly Pro Lys Ser Asn 1 5

<210> 176 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 176 Tyr Gly His Gly Asp 1 5

<210> 177 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 177 Gly Ser Arg Gln Asp 1 5

<210> 178 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 178 Ser Arg Gly Val Asn 1 5

<210> 179 Page 40

146392026840SEQLIST.TXT 28 Jun 2021

<211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 179 Gly Pro Asn Asp Phe 1 5 2021204400

<210> 180 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 180 Gly Arg Gly Asp Tyr 1 5

<210> 181 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 181 Ala Ser Gly Ser Ser 1 5

<210> 182 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 182 Ser Pro Gly Gly Arg 1 5

<210> 183 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 183 Gly Phe Arg Gly Thr 1 5

<210> 184 <211> 5 <212> PRT <213> Artificial Sequence Page 41

146392026840SEQLIST.TXT 28 Jun 2021

<220> <223> Synthetic Construct <400> 184 Arg Asp Arg Val Gly 1 5

<210> 185 <211> 6 <212> PRT 2021204400

<213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = V or R or N or S or E or G <220> <221> VARIANT <222> 2 <223> Xaa = N or S or G or R

<220> <221> VARIANT <222> 3 <223> Xaa = R or V or K or S or N or I or Y

<220> <221> VARIANT <222> 4 <223> Xaa = V or N or I or R or S or T

<220> <221> VARIANT <222> 5 <223> Xaa = R or K or I or N

<220> <221> VARIANT <222> 6 <223> Xaa = G or I or R or K or S or A

<400> 185 Xaa Xaa Xaa Xaa Xaa Xaa 1 5

<210> 186 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = A or R or M or V or G or S <220> <221> VARIANT <222> 2 Page 42

146392026840SEQLIST.TXT 28 Jun 2021

<223> Xaa = N or T or S or A <220> <221> VARIANT <222> 3 <223> Xaa = R or N or H

<220> <221> VARIANT <222> 4 <223> Xaa = V or R or K 2021204400

<220> <221> VARIANT <222> 5 <223> Xaa = K or V or I <220> <221> VARIANT <222> 6 <223> Xaa = R or K or A or N or S or V <220> <221> VARIANT <222> 7 <223> Xaa = T or G or R or K or P

<220> <221> VARIANT <222> 8 <223> Xaa = S or G or R or A

<400> 186 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5

<210> 187 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = R or A or Q <220> <221> VARIANT <222> 2 <223> Xaa = S or A <220> <221> VARIANT <222> 3 <223> Xaa = G or S or N or I <220> <221> VARIANT <222> 4 <223> Xaa = N or K <220> <221> VARIANT <222> 5 Page 43

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<223> Xaa = T or S or L or R <220> <221> VARIANT <222> 6 <223> Xaa = I or R or V

<220> <221> VARIANT <222> 7 <223> Xaa = R or E or K 2021204400

<220> <221> VARIANT <222> 8 <223> Xaa = K or Q or A or R <220> <221> VARIANT <222> 9 <223> Xaa = R or G or Q <220> <221> VARIANT <222> 10 <223> Xaa = E or W or G or R

<400> 187 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5 10

<210> 188 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = G or S or N or Y or A or R <220> <221> VARIANT <222> 2 <223> Xaa = P or G or S or V or E or R or F or D <220> <221> VARIANT <222> 3 <223> Xaa = N or G or S or E or P or K or H or R <220> <221> VARIANT <222> 4 <223> Xaa = G or R or H or S or Q or V or D <220> <221> VARIANT <222> 5 <223> Xaa = F or D or N or R or G or Y or S or T <400> 188 Xaa Xaa Xaa Xaa Xaa 1 5 Page 44

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<210> 189 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 189 Gly Cys Arg Thr Asn Arg Val Lys Gly Gly Cys Lys Gln Asp Ser Asp 2021204400

1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 190 <211> 28 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 190 Gly Cys Val Asn Arg Val Arg Gly Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Ser Gly Gly Arg Asp Cys Gly 20 25

<210> 191 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 191 Gly Cys Met Asn His Val Lys Ala Arg Arg Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 192 <211> 28 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 192 Gly Cys Arg Ser Val Asn Lys Ile Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Gly Ser Ser Arg Asn Cys Gly 20 25

<210> 193 <211> 28 <212> PRT <213> Artificial Sequence <220> Page 45

146392026840SEQLIST.TXT 28 Jun 2021

<223> Synthetic Construct <400> 193 Gly Cys Val Asn Lys Ile Lys Gly Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Gly Val Glu Gly Arg Cys Gly 20 25

<210> 194 <211> 28 <212> PRT 2021204400

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 194 Gly Cys Arg Asn Ser Ile Lys Arg Cys Lys Gln Asn Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Ser Val Gly His Gly Cys Gly 20 25

<210> 195 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 195 Gly Cys Val Ser Asn Arg Val Asn Lys Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 196 <211> 28 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 196 Gly Cys Arg Gly Asn Ile Ile Lys Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Asn Glu Ser Arg Gly Cys Gly 20 25

<210> 197 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 197 Gly Cys Arg Ser Gly Asn Thr Ile Arg Lys Arg Glu Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Gly Pro Gly Gly Cys Gly 20 25 30

Page 46

146392026840SEQLIST.TXT 28 Jun 2021

<210> 198 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 198 Gly Cys Ala Ser Ser Asn Ser Ile Arg Gln Gly Trp Cys Lys Gln Asp 1 5 10 15 2021204400

Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Pro Lys Ser Asn Cys Gly 20 25 30

<210> 199 <211> 28 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 199 Gly Cys Arg Ser Asn Arg Ile Arg Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Tyr Gly His Gly Asp Cys Gly 20 25

<210> 200 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 200 Gly Cys Arg Ser Asn Lys Leu Arg Glu Ala Arg Gly Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Ser Arg Gln Asp Cys Gly 20 25 30

<210> 201 <211> 28 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 201 Gly Cys Val Asn Ser Val Lys Arg Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Ser Arg Gly Val Asn Cys Gly 20 25

<210> 202 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 47

146392026840SEQLIST.TXT 28 Jun 2021

<400> 202 Gly Cys Gly Ser Asn Lys Ile Arg Pro Arg Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Asp Phe Cys Gly 20 25 30

<210> 203 <211> 28 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 203 Gly Cys Asn Arg Ile Arg Asn Ser Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Gly Arg Gly Asp Tyr Cys Gly 20 25

<210> 204 <211> 28 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 204 Gly Cys Ser Arg Asn Ser Ile Lys Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Ala Ser Gly Ser Ser Cys Gly 20 25

<210> 205 <211> 28 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 205 Gly Cys Ser Asn Tyr Val Lys Arg Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Ser Pro Gly Gly Arg Cys Gly 20 25

<210> 206 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 206 Gly Cys Arg Ala Asn Arg Val Ser Gly Arg Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

Page 48

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<210> 207 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 207 Gly Cys Ser Asn Arg Val Lys Val Arg Ala Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 2021204400

20 25 30

<210> 208 <211> 28 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 208 Gly Cys Glu Asn Arg Thr Lys Gly Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Gly Phe Arg Gly Thr Cys Gly 20 25

<210> 209 <211> 28 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 209 Gly Cys Gly Asn Lys Ile Arg Ala Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Arg Asp Arg Val Gly Cys Gly 20 25

<210> 210 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 210 Gly Cys Ala Asn Arg Val Lys Arg Thr Ser Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 211 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

Page 49

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<400> 211 Gly Glu Ser Leu Ser 1 5

<210> 212 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<220> <221> VARIANT <222> 6 <223> Xaa = 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, or sulfotyrosine <400> 212 Asn Ile Met Leu Pro Xaa Trp Gly 1 5

<210> 213 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 7 <223> Xaa = 1-Naphthyl alanine, 2-Naphthyl alanine, or 2-chloroindole <400> 213 Asn Ile Met Leu Pro Phe Xaa Gly 1 5

<210> 214 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 3 <223> Xaa = norleucine <400> 214 Asp Val Xaa Gln Pro Tyr Trp Gly 1 5

<210> 215 <211> 30 <212> PRT <213> Artificial Sequence

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<220> <223> Synthetic Construct

<400> 215 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Gln Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 216 <211> 30 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 30 <223> glycine can be capped with C(=O)-oxetane-3yl <400> 216 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 217 <211> 28 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 217 Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu Cys 1 5 10 15 Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys 20 25

<210> 218 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 218 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 219 <211> 30 <212> PRT Page 51

146392026840SEQLIST.TXT 28 Jun 2021

<213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 9 <223> Xaa = 1-naphthylalanine, or 2-naphthylalanine <400> 219 Gly Cys Asn Ile Met Leu Pro Phe Xaa Gly Cys Gly Arg Asp Phe Glu 2021204400

1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 220 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 3 <223> Xaa = 3-fluorotyrosine, or 4-fluorophenylalanine <400> 220 Gln Tyr Xaa Gln Ser 1 5

<210> 221 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1 <223> Xaa = PEG6-propargylglycine <400> 221 Xaa Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 222 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 222 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Asn Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30 Page 52

146392026840SEQLIST.TXT 28 Jun 2021

<210> 223 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 223 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 2021204400

1 5 10 15 Cys Phe Tyr Glu Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 224 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 224 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 225 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 225 Glu Thr Asp Trp Tyr Pro His Gln Ile Asp 1 5 10

<210> 226 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 226 Gly Glu Thr Val Phe Glu Gln Phe Leu Trp 1 5 10

<210> 227 <211> 6 <212> PRT <213> Artificial Sequence

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<220> <223> Synthetic Construct

<400> 227 His Met Met Tyr Asp Tyr 1 5

<210> 228 <211> 8 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 228 Lys Lys Trp Gln Trp Trp Tyr Met 1 5

<210> 229 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 229 Pro Ala Ile Gln Asn Trp Lys Glu His Pro 1 5 10

<210> 230 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 230 Gln Leu Met His Pro Phe Trp Gly 1 5

<210> 231 <211> 6 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 231 His Met Met Tyr Asp Tyr 1 5

<210> 232 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

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<220> <221> VARIANT <222> 1 <223> Xaa = E or G or P or Q or R or T or V <220> <221> VARIANT <222> 2 <223> Xaa = T or E or A or D <220> <221> VARIANT 2021204400

<222> 3 <223> Xaa = D or T or I or P <220> <221> VARIANT <222> 4 <223> Xaa = W or V or Q or T or W

<220> <221> VARIANT <222> 5 <223> Xaa = Y or F or N or E or P or K <220> <221> VARIANT <222> 6 <223> Xaa = P or E or W or N or P <220> <221> VARIANT <222> 7 <223> Xaa = H or Q or K or W or H <220> <221> VARIANT <222> 8 <223> Xaa = Q or F or E or A or D or W <220> <221> VARIANT <222> 9 <223> Xaa = I or L or H <220> <221> VARIANT <222> 10 <223> Xaa = D or W or P or Y or T or M or N <400> 232 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5 10

<210> 233 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 233 Gly Pro Asn Gly Phe 1 5

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<210> 234 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 234 Gly Pro Asn Gly Phe 1 5 2021204400

<210> 235 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 235 Glu Met Tyr Asp Ala 1 5

<210> 236 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 236 Tyr Pro Trp Thr Glu 1 5

<210> 237 <211> 6 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 237 Ser Trp Trp Pro Ser Leu 1 5

<210> 238 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 238 His Trp Tyr Arg Ser 1 5

<210> 239 <211> 32 <212> PRT Page 56

146392026840SEQLIST.TXT 28 Jun 2021

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 239 Gly Cys Glu Thr Asp Trp Tyr Pro His Gln Ile Asp Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30 2021204400

<210> 240 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 240 Gly Cys Gly Glu Thr Val Phe Glu Gln Phe Leu Trp Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 241 <211> 28 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 241 Gly Cys His Met Met Tyr Asp Tyr Cys Lys Gln Asp Ser Asp Cys Leu 1 5 10 15 Ala Gly Cys Val Cys Glu Met Tyr Asp Ala Cys Gly 20 25

<210> 242 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 242 Gly Cys Lys Lys Trp Gln Trp Trp Tyr Met Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Tyr Pro Trp Thr Glu Cys Gly 20 25 30

<210> 243 <211> 33 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 243 Gly Cys Pro Ala Ile Gln Asn Trp Lys Glu His Pro Cys Lys Gln Asp 1 5 10 15 Page 57

146392026840SEQLIST.TXT 28 Jun 2021

Ser Asp Cys Leu Ala Gly Cys Val Cys Ser Trp Trp Pro Ser Leu Cys 20 25 30 Gly

<210> 244 <211> 30 <212> PRT <213> Artificial Sequence <220> 2021204400

<223> Synthetic Construct <400> 244 Gly Cys Gln Leu Met His Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Arg Ser Cys Gly 20 25 30

<210> 245 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 245 His Leu Phe Glu Pro Leu Trp Gly 1 5

<210> 246 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 246 Gln Val Met Arg Pro Phe Trp Gly 1 5

<210> 247 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 247 Gln Val Met Gln Pro Ala Trp Gly 1 5

<210> 248 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

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<400> 248 His Arg Leu Gln Pro Leu Trp Gly 1 5

<210> 249 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 249 Glu Leu Leu Gln Pro Ser Trp Gly 1 5

<210> 250 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 250 Asn Val Leu Leu Pro Leu Trp Gly 1 5

<210> 251 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 251 Asp Leu Met Gln Pro Leu Trp Gly 1 5

<210> 252 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 252 Asn Pro Met Leu Pro Leu Trp Gly 1 5

<210> 253 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 253 Gln Val Leu Gln Pro Ser Trp Gly 1 5 Page 59

146392026840SEQLIST.TXT 28 Jun 2021

<210> 254 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 254 Gln Leu Leu Glu Pro Met Trp Gly 2021204400

1 5

<210> 255 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 255 Lys Leu Leu Gln Pro Met Trp Gly 1 5

<210> 256 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 256 Asp Arg Met Gln Pro Tyr Trp Gly 1 5

<210> 257 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 257 Lys Ile Met Gln Pro Leu Trp Gly 1 5

<210> 258 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 258 Asn Leu Met His Pro Phe Trp Gly 1 5

<210> 259 Page 60

146392026840SEQLIST.TXT 28 Jun 2021

<211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 259 Ala Leu Leu Gln Pro Leu Trp Gly 1 5 2021204400

<210> 260 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 260 Arg Leu Leu Glu Pro Ser Trp Gly 1 5

<210> 261 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 261 His Leu Leu Leu Pro Leu Trp Gly 1 5

<210> 262 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 262 Gln Trp Tyr Lys Ser 1 5

<210> 263 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 263 Leu Trp Tyr Asp Ser 1 5

<210> 264 <211> 5 <212> PRT <213> Artificial Sequence Page 61

146392026840SEQLIST.TXT 28 Jun 2021

<220> <223> Synthetic Construct <400> 264 Gln Trp Tyr Gln Ser 1 5

<210> 265 <211> 30 <212> PRT 2021204400

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 265 Gly Cys His Leu Phe Glu Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 266 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 266 Gly Cys Gln Val Met Arg Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 267 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 267 Gly Cys Gln Val Met Gln Pro Ala Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 268 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 268 Gly Cys His Arg Leu Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

Page 62

146392026840SEQLIST.TXT 28 Jun 2021

<210> 269 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 269 Gly Cys Glu Leu Leu Gln Pro Ser Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 2021204400

Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 270 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 270 Gly Cys Asn Pro Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 271 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 271 Gly Cys Asn Val Leu Leu Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 272 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 272 Gly Cys Asp Ile Met Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 273 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 63

146392026840SEQLIST.TXT 28 Jun 2021

<400> 273 Gly Cys Asp Leu Met Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 274 <211> 5 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 274 Gln Met Phe Asn Ser 1 5

<210> 275 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 275 Gly Cys Gln Val Leu Gln Pro Ser Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 276 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 276 Gly Cys Gln Leu Met Gln Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 277 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 3 <223> Xaa = norleucine <400> 277 Asn Ile Xaa Leu Pro Phe Trp Gly 1 5

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146392026840SEQLIST.TXT 28 Jun 2021

<210> 278 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 278 Gly Cys Gln Leu Met Gln Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 2021204400

Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr His Ser Cys Gly 20 25 30

<210> 279 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 279 Gly Cys Gln Leu Leu Glu Pro Met Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 280 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 280 Gly Cys Lys Leu Leu Gln Pro Met Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 281 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 281 Gly Cys Asp Arg Met Gln Pro Tyr Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Trp Tyr Lys Ser Cys Gly 20 25 30

<210> 282 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 65

146392026840SEQLIST.TXT 28 Jun 2021

<400> 282 Gly Cys Lys Ile Met Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Leu Trp Tyr Asp Ser Cys Gly 20 25 30

<210> 283 <211> 30 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 283 Gly Cys Asn Leu Met His Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 284 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 284 Gly Cys Ala Leu Leu Gln Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 285 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 285 Gly Cys Arg Leu Leu Glu Pro Ser Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Trp Tyr Gln Ser Cys Gly 20 25 30

<210> 286 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 286 Gly Cys His Leu Leu Leu Pro Leu Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Arg Trp Tyr His Ser Cys Gly 20 25 30

Page 66

146392026840SEQLIST.TXT 28 Jun 2021

<210> 287 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 287 Asp Asp Pro Ser Phe Asp Trp Ser Val Tyr 1 5 10 2021204400

<210> 288 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 288 Trp Asp Pro Thr Phe Asn Trp Ala Leu Tyr 1 5 10

<210> 289 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 289 Gln Asp Pro Thr Leu Asn Trp Ala Thr Tyr 1 5 10

<210> 290 <211> 10 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 290 Glu Asp Pro Thr Val Asp Trp Ala Gln Tyr 1 5 10

<210> 291 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 291 Lys Asp Thr Thr Phe Asn Trp Gly Leu Phe 1 5 10

<210> 292 <211> 5 <212> PRT Page 67

146392026840SEQLIST.TXT 28 Jun 2021

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 292 Arg Met Tyr Asp Ser 1 5

<210> 293 <211> 32 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 293 Gly Cys Asp Asp Pro Ser Phe Asp Trp Ser Val Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Arg Met Tyr Asp Ser Cys Gly 20 25 30

<210> 294 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 294 Gly Cys Trp Asp Pro Thr Phe Asn Trp Ala Leu Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Tyr Asp Ser Cys Gly 20 25 30

<210> 295 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 295 Gly Cys Gln Asp Pro Thr Leu Asn Trp Ala Thr Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Tyr Gln Ser Cys Gly 20 25 30

<210> 296 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 296 Gly Cys Glu Asp Pro Thr Val Asp Trp Ala Gln Tyr Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Met Tyr Gln Ser Cys Gly 20 25 30 Page 68

146392026840SEQLIST.TXT 28 Jun 2021

<210> 297 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 297 Gly Cys Lys Asp Thr Thr Phe Asn Trp Gly Leu Phe Cys Lys Gln Asp 2021204400

1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gln Leu Tyr Gln Ser Cys Gly 20 25 30

<210> 298 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 298 Gly Pro Glu Leu Asn 1 5

<210> 299 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 299 Gln Ala Asp Tyr Ala 1 5

<210> 300 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 300 Gly Val Asp Tyr Leu 1 5

<210> 301 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 301 Gly Thr Asn Phe Leu 1 5

Page 69

146392026840SEQLIST.TXT 28 Jun 2021

<210> 302 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 302 Ser Arg Asp Phe Asp 1 5 2021204400

<210> 303 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 303 Asn Arg Asp Phe Leu 1 5

<210> 304 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 304 Gly Trp Asp Gln Phe 1 5

<210> 305 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 305 Gly Lys Asp Phe His 1 5

<210> 306 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 306 Ser Gly Asp Phe Ala 1 5

<210> 307 <211> 5 Page 70

146392026840SEQLIST.TXT 28 Jun 2021

<212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 307 Gly Lys Glu Leu Asn 1 5

<210> 308 2021204400

<211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 308 Gly Trp Ser Met Asp 1 5

<210> 309 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 309 Gly Tyr Asp Leu Gln 1 5

<210> 310 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 310 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Pro Glu Leu Asn 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 311 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 311 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gln Ala Asp Tyr Ala 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 312 Page 71

146392026840SEQLIST.TXT 28 Jun 2021

<211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 312 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Val Asp Tyr Leu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30 2021204400

<210> 313 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 313 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Thr Asn Phe Leu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 314 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 314 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Ser Arg Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 315 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 315 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Asn Arg Asp Phe Leu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 316 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 316 Page 72

146392026840SEQLIST.TXT 28 Jun 2021

Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Trp Asp Gln Phe 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 317 <211> 30 <212> PRT <213> Artificial Sequence <220> 2021204400

<223> Synthetic Construct <400> 317 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Lys Asp Phe His 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 318 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 318 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Ser Gly Asp Phe Ala 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 319 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 319 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Lys Glu Leu Asn 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 320 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 320 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Trp Ser Met Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 321 <211> 30 Page 73

146392026840SEQLIST.TXT 28 Jun 2021

<212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 321 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Tyr Asp Leu Gln 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30 2021204400

<210> 322 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 322 Gly Arg Asp Leu Gln 1 5

<210> 323 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 323 Gly Val Asp Leu Ser 1 5

<210> 324 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 324 Gly Asp Asp Leu Glu 1 5

<210> 325 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 325 Gly Val Asp Met Thr 1 5

<210> 326 <211> 5 <212> PRT Page 74

146392026840SEQLIST.TXT 28 Jun 2021

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 326 Gly Met Asp Ile Glu 1 5

<210> 327 <211> 5 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 327 Asp Gly Asp Tyr Gln 1 5

<210> 328 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 328 Gly Asn Asp Val Ser 1 5

<210> 329 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 329 Ala Gly Asp Glu Leu 1 5

<210> 330 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 330 Gly Leu Asp Glu Glu 1 5

<210> 331 <211> 5 <212> PRT <213> Artificial Sequence <220> Page 75

146392026840SEQLIST.TXT 28 Jun 2021

<223> Synthetic Construct <400> 331 Asp Gly Asp Phe Asp 1 5

<210> 332 <211> 5 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 332 Ala Gly Asp Phe Glu 1 5

<210> 333 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 333 Gly Asn Ser Phe Glu 1 5

<210> 334 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 334 Gly Gln Asp Leu Thr 1 5

<210> 335 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 335 Gly Glu Asn Leu Ala 1 5

<210> 336 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 336 Page 76

146392026840SEQLIST.TXT 28 Jun 2021

Gly Gln Asp Tyr Asn 1 5

<210> 337 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 337 Gly Ala Asp Leu Ser 1 5

<210> 338 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 338 Gly Phe Asp Met Asp 1 5

<210> 339 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 339 Asp Leu Asn Tyr Glu 1 5

<210> 340 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 340 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Arg Asp Leu Gln 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 341 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 341 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Val Asp Leu Ser Page 77

146392026840SEQLIST.TXT 28 Jun 2021

1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 342 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 342 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Asp Asp Leu Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 343 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 343 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Val Asp Met Thr 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 344 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 344 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Met Asp Ile Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 345 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 345 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Asp Gly Asp Tyr Gln 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 346 <211> 30 <212> PRT Page 78

146392026840SEQLIST.TXT 28 Jun 2021

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 346 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Asn Asp Val Ser 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30 2021204400

<210> 347 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 347 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Ala Gly Asp Glu Leu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 348 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 348 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Leu Asp Glu Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 349 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 349 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Asp Gly Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 350 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 350 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Ala Gly Asp Phe Glu 1 5 10 15 Page 79

146392026840SEQLIST.TXT 28 Jun 2021

Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 351 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 351 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Asn Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 352 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 352 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Gln Asp Leu Thr 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 353 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 353 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Glu Asn Leu Ala 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 354 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 354 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Gln Asp Tyr Asn 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 355 <211> 30 <212> PRT <213> Artificial Sequence Page 80

146392026840SEQLIST.TXT 28 Jun 2021

<220> <223> Synthetic Construct <400> 355 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Ala Asp Leu Ser 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 356 2021204400

<211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 356 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Gly Phe Asp Met Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 357 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 357 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Asp Leu Asn Tyr Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 358 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1 <223> Xaa = Q or H or E or N or D <220> <221> VARIANT <222> 2 <223> Xaa = L or V or R or P or I <220> <221> VARIANT <222> 3 <223> Xaa = M or F or L <220> <221> VARIANT <222> 4 <223> Xaa = Q or E or R or L Page 81

146392026840SEQLIST.TXT 28 Jun 2021

<220> <221> VARIANT <222> 6 <223> Xaa = F or A or L or S

<400> 358 Xaa Xaa Xaa Xaa Pro Xaa Trp Gly 1 5

<210> 359 2021204400

<211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1 <223> Xaa = R or H <220> <221> VARIANT <222> 4 <223> Xaa = N or Q or H <400> 359 Xaa Trp Tyr Xaa Ser 1 5

<210> 360 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1 <223> Xaa = H or L or R or Q

<220> <221> VARIANT <222> 2 <223> Xaa = W or F or Y <220> <221> VARIANT <222> 4 <223> Xaa = Q or N or K or H or D or E <400> 360 Xaa Xaa Tyr Xaa Ser 1 5

<210> 361 <211> 30 <212> PRT <213> Artificial Sequence <220> Page 82

146392026840SEQLIST.TXT 28 Jun 2021

<223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine

<400> 361 Xaa Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30 2021204400

<210> 362 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 8 <223> Xaa = sulfotyrosine, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L-alanine, or pyridone(NH meta)-L-alanine

<400> 362 Gly Cys Asn Ile Met Leu Pro Xaa Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 363 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 363 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Ser Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 364 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 364 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Ser Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

Page 83

146392026840SEQLIST.TXT 28 Jun 2021

<210> 365 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine 2021204400

<400> 365 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Ser Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 366 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 366 Gly Cys Gln Ala Ile Asn Arg Val Lys Arg Gln Arg Cys Lys Gln Asp 1 5 10 15 Ser Asp Cys Leu Ala Gly Cys Val Cys Gly Pro Asn Gly Phe Cys Gly 20 25 30

<210> 367 <211> 10 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 367 Gln Ala Ile Asn Arg Val Lys Arg Gln Arg 1 5 10

<210> 368 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 368 Asn Pro Met Leu Pro Phe Trp Gly 1 5

<210> 369 <211> 33 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 84

146392026840SEQLIST.TXT 28 Jun 2021

<400> 369 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Pro Leu 20 25 30 Ile

<210> 370 <211> 33 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 370 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Asn Tyr 20 25 30 Gln

<210> 371 <211> 33 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 371 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Pro Leu 20 25 30 Gln

<210> 372 <211> 33 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 372 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Thr Phe 20 25 30 Gln

<210> 373 <211> 33 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 85

146392026840SEQLIST.TXT 28 Jun 2021

<400> 373 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Asp Leu 20 25 30 Val

<210> 374 <211> 33 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 374 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Glu His 20 25 30 Lys

<210> 375 <211> 33 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 375 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Tyr Leu 20 25 30 Ser

<210> 376 <211> 33 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 376 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Trp Asp 20 25 30 Tyr

<210> 377 <211> 33 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 86

146392026840SEQLIST.TXT 28 Jun 2021

<400> 377 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Trp Pro 20 25 30 His

<210> 378 <211> 33 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 378 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Pro His 20 25 30 Gln

<210> 379 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 379 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Phe His 20 25 30

<210> 380 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 380 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Ile Ala 20 25 30

<210> 381 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 381 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Page 87

146392026840SEQLIST.TXT 28 Jun 2021

Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Gly Ser 20 25 30

<210> 382 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 382 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Thr Arg 20 25 30

<210> 383 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 383 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Val His 20 25 30

<210> 384 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 384 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Leu Ser 20 25 30

<210> 385 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 385 Asp Val Leu Gln Pro Tyr Trp Gly 1 5

<210> 386 <211> 30 <212> PRT <213> Artificial Sequence <220> Page 88

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<223> Synthetic Construct <400> 386 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 387 <211> 32 <212> PRT 2021204400

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 387 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Arg Thr 20 25 30

<210> 388 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 388 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Trp Lys 20 25 30

<210> 389 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 389 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Pro Leu 20 25 30

<210> 390 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 390 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Asp Glu 20 25 30

Page 89

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<210> 391 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 391 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 2021204400

Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Gln Phe 20 25 30

<210> 392 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 392 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Glu Gln 20 25 30

<210> 393 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 393 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Pro Thr 20 25 30

<210> 394 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 394 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Arg Leu 20 25 30

<210> 395 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 90

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<400> 395 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Ser Leu 20 25 30

<210> 396 <211> 8 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 396 Asn Ile Leu Leu Pro Phe Trp Gly 1 5

<210> 397 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 397 Asn Ile Leu Leu Pro Tyr Trp Gly 1 5

<210> 398 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 398 Asn Ile Met Ser Pro Phe Trp Gly 1 5

<210> 399 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 399 Asn Ile Met Thr Pro Phe Trp Gly 1 5

<210> 400 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

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<400> 400 Asn Ile Met Gln Pro Phe Trp Gly 1 5

<210> 401 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 401 Asn Ile Met Asn Pro Phe Trp Gly 1 5

<210> 402 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 402 Asn Ile Met Glu Pro Phe Trp Gly 1 5

<210> 403 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 403 Asn Ile Met Asp Pro Phe Trp Gly 1 5

<210> 404 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = benzyl-L-proline, 4-fluoro-benzyl-L-proline, 3-OH-L-proline, 3-fluoro-L-proline, or trifluoromethyl-benzyl-L-proline <400> 404 Asn Ile Met Leu Xaa Phe Trp Gly 1 5

<210> 405 <211> 30 <212> PRT <213> Artificial Sequence Page 92

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<220> <223> Synthetic Construct <400> 405 Gly Cys Asn Ile Leu Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 406 2021204400

<211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 406 Gly Cys Asn Ile Leu Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 407 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 407 Gly Cys Asn Ile Met Ser Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 408 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 408 Gly Cys Asn Ile Met Thr Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 409 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 409 Gly Cys Asn Ile Met Gln Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Page 93

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20 25 30

<210> 410 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 410 2021204400

Gly Cys Asn Ile Met Asn Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 411 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 411 Gly Cys Asn Ile Met Glu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 412 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 412 Gly Cys Asn Ile Met Asp Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 413 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 7 <223> Xaa = benzyl-L-proline, 4-fluoro-benzyl-L-proline, 3-OH-L-proline, 3-fluoro-L-proline, or trifluoromethyl-benzyl-L-proline <400> 413 Gly Cys Asn Ile Met Leu Xaa Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

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<210> 414 <211> 8 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 414 Asn Ile Met Leu Pro Ser Trp Gly 1 5 2021204400

<210> 415 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 415 Gly Cys Asn Ile Met Leu Pro Ser Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 416 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 7 <223> Xaa = N-methyl indole, N-ethyl indole, N-isopropyl indole, or 5-aza-indole

<400> 416 Asn Ile Met Leu Pro Tyr Xaa Gly 1 5

<210> 417 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 9 <223> Xaa = N-methyl indole, N-ethyl indole, N-isopropyl indole, or 5-aza-indole <400> 417 Gly Cys Asn Ile Met Leu Pro Tyr Xaa Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

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<210> 418 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 4 2021204400

<223> Xaa = 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, 2-quinolyl-Alanine, 4-biphenyl-L-alanine

<220> <221> VARIANT <222> 4 <223> Xaa = 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine

<220> <221> VARIANT <222> 4 <223> Xaa = 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, or benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine <400> 418 Gly Arg Asp Xaa Glu 1 5

<210> 419 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 15 <223> Xaa = 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, 2-quinolyl-Alanine, 4-biphenyl-L-alanine <220> <221> VARIANT <222> 15 <223> Xaa = 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine <220> <221> VARIANT <222> 15 <223> Xaa = 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, or 3-isoquinolinyl-L-alanine <400> 419 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Xaa Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 420 Page 96

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<211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 18 <223> Xaa = t-butyl-L-alanine, cyclobutyl-L-alanine, cyclopentyl-L-alanine, or 5,5,5-Trifluoro-L-leucine 2021204400

<400> 420 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Xaa Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 421 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 421 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ser Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 422 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 422 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Thr Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 423 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 423 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Glu Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 424 <211> 30 <212> PRT Page 97

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<213> Artificial Sequence <220> <223> Synthetic Construct <400> 424 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Leu Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30 2021204400

<210> 425 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 425 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 426 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 22 <223> Xaa = t-butyl-L-glycine (also known as L-tert-Leucine), t-butyl-L-alanine, L-cyclopentylglycine, cyclopentyl-L-alanine <220> <221> VARIANT <222> 22 <223> Xaa = L-cyclobutyl-L-glycine, cyclobutyl-L-alanine, or 5,5,5-Trifluoro-L-leucine

<400> 426 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Xaa Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 427 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 2 <223> Xaa = 2-pyridone, 3,4-hydroxy phenylalanine, 3,4-fluoro phenylalanine, or 3-Fluoro,4-OH phenylalanine

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<400> 427 Gln Xaa Tyr Gln Ser 1 5

<210> 428 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<220> <221> VARIANT <222> 25 <223> Xaa = 2-pyridone, 3,4-hydroxy phenylalanine, 3,4-fluoro phenylalanine, or 3-Fluoro,4-OH phenylalanine

<400> 428 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Xaa Tyr Gln Ser Cys Gly 20 25 30

<210> 429 <211> 5 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 3 <223> Xaa = 2-Chloro Tyrosine, 2-Methyl Tyrosine, 2-Ethyl Tyrosine, or 1-naphthol alanine <400> 429 Gln Tyr Xaa Gln Ser 1 5

<210> 430 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 26 <223> Xaa = 2-Chloro Tyrosine, 2-Methyl Tyrosine, 2-Ethyl Tyrosine, or 1-naphthol alanine <400> 430 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Xaa Gln Ser Cys Gly 20 25 30

<210> 431 <211> 30 Page 99

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<212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 431 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Ser 20 25 30 2021204400

<210> 432 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 30 <223> Xaa = D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl Glycine, glycine amide, glycine ester of glycerol

<220> <221> VARIANT <222> 30 <223> Xaa = glycine ester of glycol, glycine ester of oxetane-3-yl alcohol, glycine morpholine amide

<400> 432 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Xaa 20 25 30

<210> 433 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 3 <223> Xaa = norleucine <400> 433 Asn Ile Xaa Gln Pro Tyr Trp Gly 1 5

<210> 434 <211> 8 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 434 Asn Ile Leu Gln Pro Tyr Trp Gly Page 100

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1 5

<210> 435 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 435 2021204400

Gly Cys Asn Ile Leu Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 436 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<400> 436 Gly Cys Asn Ile Xaa Gln Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 437 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 18 <223> Xaa = norleucine or cyclobutyl-L-alanine <400> 437 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Xaa Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 438 <211> 30 <212> PRT <213> Artificial Sequence

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<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 438 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 2021204400

20 25 30

<210> 439 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<220> <221> VARIANT <222> 18 <223> Xaa = cyclobutyl-L-alanine

<220> <221> VARIANT <222> 22 <223> Xaa = cyclobutyl-L-glycine, cyclobutyl-L-alanine or norleucine

<400> 439 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Xaa Glu Gln Cys Xaa Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 440 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 18 <223> Xaa = cyclobutyl-L-alanine <220> <221> VARIANT <222> 22 <223> Xaa = cyclobutyl-L-glycine or cyclobutyl-L-alanine Page 102

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<400> 440 Gly Cys Asn Ile Xaa Gln Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Xaa Glu Gln Cys Xaa Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 441 <211> 30 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 18 <223> Xaa = cyclobutyl-L-alanine or t-butyl-L-alanine <400> 441 Gly Cys Asn Ile Leu Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Xaa Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 442 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 22 <223> Xaa = cyclobutyl-L-glycine or cyclobutyl-L-alanine <400> 442 Gly Cys Asn Ile Leu Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Xaa Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 443 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT Page 103

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<222> 30 <223> Xaa = glycine amide

<400> 443 Xaa Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Xaa 20 25 30

<210> 444 <211> 30 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine <220> <221> VARIANT <222> 30 <223> Xaa = glycine amide

<400> 444 Xaa Cys Asn Ile Leu Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Xaa 20 25 30

<210> 445 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine <220> <221> VARIANT <222> 30 <223> Xaa = glycine amide <400> 445 Xaa Cys Asn Ile Leu Gln Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Xaa 20 25 30

<210> 446 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

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<220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine <220> <221> VARIANT <222> 30 <223> Xaa = glycine amide <400> 446 Xaa Cys Asn Ile Leu Gln Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 2021204400

1 5 10 15 Cys Leu Glu Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Xaa 20 25 30

<210> 447 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 18 <223> Xaa = cyclobutyl-L-alanine or t-butyl-L-alanine <400> 447 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Xaa Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 448 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 22 <223> Xaa = cyclobutyl-L-glycine <400> 448 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Xaa Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 449 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 Page 105

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<223> Xaa = norleucine <220> <221> VARIANT <222> 18 <223> Xaa = cyclobutyl-L-alanine

<220> <221> VARIANT <222> 22 <223> Xaa = cyclobutyl-L-glycine or cyclobutyl-L-alanine 2021204400

<400> 449 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Xaa Ser Asn Cys Xaa Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 450 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 18 <223> Xaa = cyclobutyl-L-alanine

<220> <221> VARIANT <222> 22 <223> Xaa = cyclobutyl-L-glycine or cyclobutyl-L-alanine

<400> 450 Gly Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Xaa Ser Asn Cys Xaa Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 451 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine <220> <221> VARIANT <222> 18 <223> Xaa = cyclobutyl-L-alanine <220> <221> VARIANT <222> 22 <223> Xaa = cyclobutyl-L-glycine or cyclobutyl-L-alanine <220> Page 106

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<221> VARIANT <222> 30 <223> Xaa = glycine amide <400> 451 Xaa Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Xaa Ser Asn Cys Xaa Cys His Trp Tyr Asn Ser Cys Xaa 20 25 30

<210> 452 2021204400

<211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 30 <223> Xaa = glycine amide <400> 452 Xaa Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Xaa 20 25 30

<210> 453 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 1 <223> Xaa = acetylglycine <220> <221> VARIANT <222> 30 <223> Xaa = glycine amide <400> 453 Xaa Cys Asp Val Leu Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Asn Cys Ile Cys His Trp Tyr Asn Ser Cys Xaa 20 25 30

<210> 454 <211> 8 Page 107

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<212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 3 <223> Xaa = M or L <220> 2021204400

<221> VARIANT <222> 4 <223> Xaa = L or S or T or Q or N or E or D <220> <221> VARIANT <222> 6 <223> Xaa = F or Y or S <400> 454 Asn Ile Xaa Xaa Pro Xaa Trp Gly 1 5

<210> 455 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 455 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Phe His 20 25 30

<210> 456 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 456 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Ser Leu 20 25 30

<210> 457 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 457 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Gly Glu Page 108

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20 25 30

<210> 458 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 458 2021204400

Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Val Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Ser Ile 20 25 30

<210> 459 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 459 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Gly Arg 20 25 30

<210> 460 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 460 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Arg Pro 20 25 30

<210> 461 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 461 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Gln Tyr 20 25 30

<210> 462 <211> 32 <212> PRT <213> Artificial Sequence

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<220> <223> Synthetic Construct

<400> 462 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Glu Asn 20 25 30

<210> 463 <211> 32 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 463 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Asp Thr 20 25 30

<210> 464 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 464 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Gln His 20 25 30

<210> 465 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 465 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Gln Asn 20 25 30

<210> 466 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 466 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Glu Glu 20 25 30 Page 110

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<210> 467 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 467 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 2021204400

1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Asp Asp 20 25 30

<210> 468 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 468 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Asp Gly 20 25 30

<210> 469 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 469 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Leu Glu 20 25 30

<210> 470 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 470 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Thr Asp 20 25 30

<210> 471 <211> 32 <212> PRT <213> Artificial Sequence <220> Page 111

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<223> Synthetic Construct <400> 471 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Ser Glu 20 25 30

<210> 472 <211> 32 <212> PRT 2021204400

<213> Artificial Sequence <220> <223> Synthetic Construct <400> 472 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Pro Glu 20 25 30

<210> 473 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 473 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Thr Asn 20 25 30

<210> 474 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 474 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Pro His 20 25 30

<210> 475 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 475 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Met Asp 20 25 30

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<210> 476 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 476 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 2021204400

Cys Leu Ala Gly Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly Ser Asp 20 25 30

<210> 477 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 477 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Gln Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Ile Ala 20 25 30

<210> 478 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 478 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Gln Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Gly Ser 20 25 30

<210> 479 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 479 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Gln Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Thr Arg 20 25 30

<210> 480 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 113

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<400> 480 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Gln Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Val His 20 25 30

<210> 481 <211> 32 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 481 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Pro Ser 20 25 30

<210> 482 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 482 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Phe Ser 20 25 30

<210> 483 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 483 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Gly Lys 20 25 30

<210> 484 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 484 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Lys Gln Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Tyr Leu 20 25 30

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<210> 485 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 485 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Asp Leu 2021204400

20 25 30

<210> 486 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 486 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Glu Lys 20 25 30

<210> 487 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 487 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Thr Asp 20 25 30

<210> 488 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 488 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Gln Val 20 25 30

<210> 489 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

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<400> 489 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Arg Leu 20 25 30

<210> 490 <211> 32 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 490 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Tyr Ala 20 25 30

<210> 491 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 491 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Ala Ser 20 25 30

<210> 492 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 492 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Ser Arg 20 25 30

<210> 493 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 493 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Pro Thr 20 25 30

<210> 494 Page 116

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<211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 494 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Trp Asp 20 25 30 2021204400

<210> 495 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 495 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Ser Met 20 25 30

<210> 496 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 496 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Thr Arg 20 25 30

<210> 497 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 497 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Lys Gln Asp Ser Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Glu Asn 20 25 30

<210> 498 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 498 Page 117

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Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Asn Asn 20 25 30

<210> 499 <211> 32 <212> PRT <213> Artificial Sequence <220> 2021204400

<223> Synthetic Construct <400> 499 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Pro Glu 20 25 30

<210> 500 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 500 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Gly Ile 20 25 30

<210> 501 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 501 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Val Glu 20 25 30

<210> 502 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 502 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Pro Leu 20 25 30

<210> 503 <211> 32 Page 118

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<212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 503 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Pro Leu 20 25 30 2021204400

<210> 504 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 504 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Arg Pro 20 25 30

<210> 505 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 505 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Asn Asp 20 25 30

<210> 506 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 506 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Leu Gln 20 25 30

<210> 507 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 507 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp Page 119

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1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Asp Glu 20 25 30

<210> 508 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 508 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Arg Thr 20 25 30

<210> 509 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 509 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Ile Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Gln Val 20 25 30

<210> 510 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 510 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Gly Ile 20 25 30

<210> 511 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 511 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Tyr Met 20 25 30

<210> 512 <211> 32 <212> PRT Page 120

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<213> Artificial Sequence <220> <223> Synthetic Construct <400> 512 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Gly Gln 20 25 30 2021204400

<210> 513 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 513 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Thr Pro 20 25 30

<210> 514 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 514 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Val Asn 20 25 30

<210> 515 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 515 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Phe Asn 20 25 30

<210> 516 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 516 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Page 121

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Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Glu Pro 20 25 30

<210> 517 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<400> 517 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Asn Ser 20 25 30

<210> 518 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 518 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Ser Thr 20 25 30

<210> 519 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<400> 519 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Arg Tyr 20 25 30

<210> 520 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 520 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Phe Ser 20 25 30

<210> 521 <211> 32 <212> PRT <213> Artificial Sequence Page 122

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<220> <223> Synthetic Construct <400> 521 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Gln Val 20 25 30

<210> 522 2021204400

<211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 522 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Tyr Ala 20 25 30

<210> 523 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 523 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Ser Arg 20 25 30

<210> 524 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 524 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Pro Thr 20 25 30

<210> 525 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 525 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Ser Met Page 123

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20 25 30

<210> 526 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 526 2021204400

Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Gly Ile 20 25 30

<210> 527 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 527 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Thr Ser 20 25 30

<210> 528 <211> 32 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <400> 528 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Leu Gln 20 25 30

<210> 529 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 529 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Val Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Asp Glu 20 25 30

<210> 530 <211> 32 <212> PRT <213> Artificial Sequence

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<220> <223> Synthetic Construct

<400> 530 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Asp Leu 20 25 30

<210> 531 <211> 32 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 531 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Val Cys His Trp Tyr Asn Ser Cys Gly Gln Phe 20 25 30

<210> 532 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 532 Gly Cys Asp Val Met Gln Pro Tyr Trp Gly Cys Glu Met Asp Phe Asp 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys His Trp Tyr Asn Ser Cys Gly Trp Lys 20 25 30

<210> 533 <211> 32 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 533 Gly Cys Asn Ile Met Leu Pro Phe Trp Gly Cys Gly Gln Ser Phe Glu 1 5 10 15 Cys Leu Ala Gly Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Leu Ser 20 25 30

<210> 534 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine

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<220> <221> VARIANT <222> 16 <223> Xaa = D or E <220> <221> VARIANT <222> 20 <223> Xaa = N, K, or ornithine <400> 534 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Xaa 2021204400

1 5 10 15 Cys Leu Ser Xaa Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 535 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 16 <223> Xaa = N, K, or ornithine <220> <221> VARIANT <222> 20 <223> Xaa = D or E <400> 535 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Xaa 1 5 10 15 Cys Leu Ser Xaa Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 536 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 536 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Lys Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 537 Page 126

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<220> <221> VARIANT <222> 20 <223> Xaa = ornithine <400> 537 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Asp 1 5 10 15 Cys Leu Ser Xaa Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 538 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<220> <221> VARIANT <222> 16 <223> Xaa = D or E

<220> <221> VARIANT <222> 20 <223> Xaa = N, K, or ornithine

<400> 538 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Met Glu Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 539 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> Page 127

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<221> VARIANT <222> 16 <223> Xaa = N or K or ornithine <220> <221> VARIANT <222> 20 <223> Xaa = D or E <400> 539 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 2021204400

Cys Met Glu Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 540 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 16 <223> Xaa = D or E <220> <221> VARIANT <222> 20 <223> Xaa = N or K or ornithine

<400> 540 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Val Ser Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 541 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 16 <223> Xaa = N or K or ornithine <220> <221> VARIANT <222> 20 <223> Xaa = D or E Page 128

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<400> 541 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Val Ser Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 542 <211> 30 <212> PRT <213> Artificial Sequence 2021204400

<220> <223> Synthetic Construct <400> 542 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Lys Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 543 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<400> 543 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Lys Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 544 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 20 <223> Xaa = ornithine <400> 544 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Met Glu Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

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<210> 545 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine 2021204400

<400> 545 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Ser Lys Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 546 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<220> <221> VARIANT <222> 20 <223> Xaa = ornithine

<400> 546 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Ser Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 547 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <400> 547 Gly Cys Asn Ile Leu Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Ser Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 548 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

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146392026840SEQLIST.TXT 28 Jun 2021

<400> 548 Gly Cys Asn Ile Leu Gln Pro Phe Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Val Ser Gln Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 549 <211> 30 <212> PRT <213> Artificial Sequence 2021204400

<220> <221> VARIANT <222> 20 <223> Xaa = D or E <400> 549 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Lys 1 5 10 15 Cys Leu Ser Xaa Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 550 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 550 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Lys 1 5 10 15 Cys Leu Ser Asp Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 551 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 551 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Lys 1 5 10 15 Page 131

146392026840SEQLIST.TXT 28 Jun 2021

Cys Leu Ser Glu Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 552 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct 2021204400

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 16 <223> Xaa = ornithine <220> <221> VARIANT <222> 20 <223> Xaa = D or E

<400> 552 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Xaa 1 5 10 15 Cys Leu Ser Xaa Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 553 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<220> <221> VARIANT <222> 16 <223> Xaa = ornithine <400> 553 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Xaa 1 5 10 15 Cys Leu Ser Asp Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 554 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> Page 132

146392026840SEQLIST.TXT 28 Jun 2021

<221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 16 <223> Xaa = ornithine <400> 554 Gly Cys Asp Val Xaa Gln Pro Tyr Trp Gly Cys Gly Pro Asp Ile Xaa 1 5 10 15 2021204400

Cys Leu Ser Glu Cys Ile Cys His Trp Tyr Asn Ser Cys Gly 20 25 30

<210> 555 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 20 <223> Xaa = D or E <400> 555 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Lys 1 5 10 15 Cys Met Glu Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 556 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine <400> 556 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Lys 1 5 10 15 Cys Met Glu Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 557 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct Page 133

146392026840SEQLIST.TXT 28 Jun 2021

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<400> 557 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Lys 1 5 10 15 Cys Met Glu Glu Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30 2021204400

<210> 558 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<220> <221> VARIANT <222> 16 <223> Xaa = ornithine

<220> <221> VARIANT <222> 20 <223> Xaa = D or E

<400> 558 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Met Glu Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 559 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 16 <223> Xaa = ornithine <400> 559 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Met Glu Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

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<210> 560 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5, 16 <223> Xaa = norleucine 2021204400

<220> <221> VARIANT <222> 16 <223> Xaa = ornithine <400> 560 Gly Cys Asn Ile Xaa Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Met Glu Glu Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 561 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<220> <221> VARIANT <222> 20 <223> Xaa = D or E

<400> 561 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Lys 1 5 10 15 Cys Val Ser Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 562 <211> 29 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 4 <223> Xaa = norleucine <400> 562 Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Lys Cys 1 5 10 15 Val Ser Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly Page 135

146392026840SEQLIST.TXT 28 Jun 2021

20 25

<210> 563 <211> 29 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> 2021204400

<221> VARIANT <222> 4 <223> Xaa = norleucine <400> 563 Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Lys Cys 1 5 10 15 Val Ser Glu Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25

<210> 564 <211> 30 <212> PRT <213> Artificial Sequence

<220> <223> Synthetic Construct

<220> <221> VARIANT <222> 5 <223> Xaa = norleucine

<220> <221> VARIANT <222> 16 <223> Xaa = ornithine <220> <221> VARIANT <222> 20 <223> Xaa = D or E <400> 564 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Val Ser Xaa Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 565 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT Page 136

146392026840SEQLIST.TXT 28 Jun 2021

<222> 16 <223> Xaa = ornithine

<400> 565 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Val Ser Asp Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 566 <211> 30 2021204400

<212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 5 <223> Xaa = norleucine <220> <221> VARIANT <222> 516 <223> Xaa = ornithine

<400> 566 Gly Cys Asn Ile Xaa Leu Pro Phe Trp Gly Cys Gly Arg Asp Phe Xaa 1 5 10 15 Cys Val Ser Glu Cys Ile Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

<210> 567 <211> 5 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct

<400> 567 Arg Trp Tyr Glu Ser 1 5

<210> 568 <211> 30 <212> PRT <213> Artificial Sequence <220> <223> Synthetic Construct <220> <221> VARIANT <222> 20 <223> Xaa = ornithine <400> 568 Gly Cys Asn Ile Met Leu Pro Tyr Trp Gly Cys Gly Arg Asp Phe Glu 1 5 10 15 Cys Leu Ala Xaa Cys Val Cys Gln Tyr Tyr Gln Ser Cys Gly 20 25 30

Page 137

Claims

CLAIMS WHAT IS CLAIMED IS:

1. A peptide comprising the scaffold structure: ZiC1LiC2L2C3L3C4L4C5L5C6Z2; wherein: Zi corresponds to the N-terminus of the peptide and is G; Z2 corresponds to the C-terminus of the peptide and is G; C1-C6 are cysteine residues; and Li is loop 1, L2 is loop 2, L3 is loop 3, L4 is loop 4, and L5 is loop 5; wherein LI is selected from the group consisting of: SEQ ID NOs: 147-168 and 367; L2 is selected from the group consisting of: SEQ ID NO: 93 or amino acids 10-14 of SEQ ID NO: 194; L3 is LAG; L4 is V; and L5 is selected from the group consisting of: SEQ ID NO: 19 and 169-184.

2. The peptide of claim 1, wherein: LI is selected from SEQ ID NOs: 147, 149, 153, 160, 164-165, and 168; L2 is SEQ ID NO: 93; L3 is LAG; L4 is V; and L5 is SEQ ID NO: 19 or 179.

3. The peptide of claim 2, comprising the amino acid sequence of any one of: SEQ ID NOs: 189, 191, 195, 202, 206, 207, and 210.

4. The peptide of claim 1, wherein: LI is selected from SEQ ID NOs: 148, 150-152, 154, 157, 159, 161-163, and 166-167; L2 is SEQ ID NO: 93 or amino acids 10-14 of SEQ ID NO: 194; L3 is LAG; L4 is V; and L5 is selected from SEQ ID NOs: 169-173, 176, 178, and 180-184.

5. The peptide of claim 4, comprising the amino acid sequence of any one of: SEQ ID NOs: 190, 192-194, 196, 199, 201, 203-205, and 208-209.

6. The peptide of claim 1, wherein: Li is selected from SEQ ID NOs: 155-156, 158 and 367; L2 is SEQ ID NO: 93; L3 is LAG; L4 is V; and L5 is selected from SEQ ID NOs: 19, 174-175, and 177.

7. The peptide of claim 6, wherein the peptide comprises any one of SEQ ID NOs: 197 198, 200, and 366.

8. The peptide of any one of claims 1-7, wherein the peptide binds to human low density lipoprotein receptor-related protein 6 (LRP6).

9. The peptide of any one of claims 1-8 conjugated to a therapeutic agent.

10. The peptide any one of claims 1-8 conjugated to a label.

11. An isolated nucleic acid encoding the peptide of any one of claims 1-8.

12. An expression vector encoding the nucleic acid molecule of claim 11.

13. A cell comprising the expression vector of claim 12.

14. A method of producing the peptide of any one of claims 1-8 comprising culturing the cell of claim 13 under conditions where the peptide is expressed, and recovering the peptide expressed by the cell.

15. A method of producing the peptide of any one of claims 1-8, comprising chemically synthesizing the peptide.

16. A composition comprising the peptide of any one of claims 1-8 and a pharmaceutically acceptable carrier.

1. A non-naturally occurring cystine knot peptide (CKP) that binds to vascular endothelial growth factor A (VEGF-A), wherein the CKP comprises the cystine scaffold structure: ZiCiL1C2L2C3L3C4L4CL5C6Z2

wherein:

Zi andZ 2 are any amino acid; Li is Loop 1 and has a structure selected from the group consisting of: XX 2 X3 X 4 X5 X6

(SEQ ID NO: 2),XiX2X3X4X5X6X7 (SEQ ID NO: 3),XiX2X3X4X5X6X7X8 (SEQ ID NO: 4), XiX2X3X4X5X6X7X8X9(SEQ ID NO: 5), andXiX2X3X4X5X6X7XX9Xio(SEQ ID NO: 6), wherein each of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure:XiX2X3X4X5 (SEQ ID NO: 7), wherein each of Xi X5 is any amino acid or an unnatural amino acid; L3 is Loop 3 and has the structure:XiX 2X 3 wherein each of Xi- X 3 is any amino acid or an unnatural amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid or an unnatural amino acid; L5 is Loop 5 and has the structure:XiX2X3X4X5 (SEQ ID NO: 7), wherein each of Xi - X5 is any amino acid or an unnatural amino acid; wherein the unnatural amino acid is selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4 dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2 pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4 methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide; wherein the CKP binds to VEGF-A with an affinity of 500 pM or better.

2. The CKP of claim 1, wherein the CKP has an altered disulfide bond connectivity-with reference to a wild-type Ecballium elaterium trypsin inhibitor EETI-II protein having the amino acid sequence set forth in SEQ ID NO: 1; wherein the altered disulfide bond connectivity is C1-C4, C2-C3 and C5-C6.

3. The CKP of claim 1 or claim 2, wherein Zi and/or Z2 is G.

4. The CKP of any one of claims 1-3, wherein in LI: X3 is not I; X 5 is not M; and/or

X 6 is not R.

5. The CKP of any one of claims 1-4, wherein in LI: Xi is an amino acid selected from P, Q, R, T, V, D, N, K, L, and X; X2 is an amino acid selected from T, D, L, V, I, R, P, N and X; X 3 is an amino acid selected from T, P, M, L, S, F, R, and X; X 4 is an amino acid selected from R, T, Q, D, W, L, E, S, K, and X; X 5 is an amino acid selected from F, P, V, E, K, L, I, and X; X 6 is an amino acid selected from K, N, F, P, L, Y, T, D, M, and X; X 7 is an amino acid selected from Q, W, H and/X; and/or X 8 is an amino acid selected from Y, A, G, D, E, W, S, and X, wherein X is and unnatural amino acid is selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4 dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2 pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4 methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

6. The CKP of claim 5, wherein in LI: X 9 is an amino acid selected from L, I, V, D, E and X, wherein X is and unnatural amino acid is selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

7. The CKP of claim 5 or claim 6, wherein in L : Xio is an amino acid selected from Y, T, M, N, F, and X, wherein X is and unnatural amino acid is selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4

(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

8. The CKP of any one of claims 1-7 wherein in L5, each of Xi - X 5 is any amino acid with the exception that X2 is not proline (P).

9. The CKP of any one of claims 1-7 wherein in L5, each of Xi - X5 is any amino acid with the exception that X4 is not glycine (G).

10. The CKP of any one of claims 1-7, wherein in L5: Xi is an amino acid selected from G, Q, H, R, L, and Q; X2 is an amino acid selected from P, M, W, Y, F, L, and H; X3 is an amino acid selected from N, F, H, and Y; X 4 is an amino acid selected from G, Q, D, N, K, H, E, and S; and/or X 5 is an amino acid selected from F, S, and T.

11. The CKP of any one of claims 1-5, wherein L has the structure XX2 X 3 X 4 XX6X 7X (SEQ ID NO: 4), and wherein: Xi is an amino acid selected from P, Q, and R; X2 is an amino acid selected from T, L, and D; X3 is an amino acid selected from T, M and L; X 4 is an amino acid selected from R, Q, and D;

X 5 is an amino acid selected from F, P, and V; X6 is an amino acid selected from K and F; X 7 is an amino acid selected from Q and W; and X 8 is an amino acid selected from Y, G, and D.

12. The CKP of anyone of claims 1-7, wherein L has the structure XX2X3X4X5X6X7X X9Xio (SEQ ID NO: 6), and wherein: Xi is an amino acid selected from Q, R, T and V; X2 is an amino acid selected from T and D; X3 is P; X 4 is an amino acid selected from T and W; X 5 is an amino acid selected from F, E, P, and K; X6 is an amino acid selected from N and P; X7 is an amino acid selected from W and H; and X 8 is an amino acid selected from A, D, E, and W; X 9 is an amino acid selected from L and I; and Xio is an amino acid selected from Y, T, M and N.

13. The CKP of claim 11 or claim 12, wherein in L5: Xi is an amino acid selected from G, H, and Q; X2 is an amino acid selected from P, M, W, and Y; X3 is an amino acid selected from N and Y; X 4 is an amino acid selected from G, Q, and S; and X 5 is an amino acid selected from F and S.

14. The CKP of any one of claims 1-5, wherein L has the structure XX2X3X4X5X6X7X (SEQ ID NO: 4), and wherein: Xi is an amino acid selected from D, Q, N, and K; X2 is an amino acid selected from V, I, R, L, and P; X 3 is an amino acid selected from L, S, M, T, and F; X 4 is an amino acid selected from Q, L, and E; X5 is P; X6 is an amino acid selected from F, L, and Y; X7 is W; and

X8 is G.

15. The CKP of claim 14, wherein in L5: X3 is Y; X5 is S; and wherein Xi, X2 and X4 are each any amino acid, with the exception that Xi is not G, X 2 is not P, X 4 is not G, and/or X5 is not F.

16. The CKP of claim 14 or claim 15, wherein in L5: Xi is an amino acid selected from H, L, R, and Q; X2 is an amino acid selected from W, F, and Y; X3 is Y; X 4 is an amino acid selected from Q, N, K, H, and E; and X 5 is S.

17. The CKP of any one of claims 1-7, wherein L has the structure XX2X3X4XX6X7X X9 Xio (SEQ ID NO: 6), and wherein: Xi is an amino acid selected from K, Q, L, and R; X2 is an amino acid selected from N and D; X3 is an amino acid selected from P and L; X 4 is an amino acid selected from L, T, S and K; X 5 is an amino acid selected from F, V, I, and L; X6 is an amino acid selected from N and D; X7 is W; X 8 is an amino acid selected from A and S; X 9 is an amino acid selected from L, V, E and D; and Xio is an amino acid selected from Y and F.

18. The CKP of claim 17, wherein in L5: Xi is Q; X2 is an amino acid selected from L, F, M, and H; X3 is an amino acid selected from F, Y, and H; X 4 is an amino acid selected from D, Q, N, and K; and X 5 is an amino acid selected from S and T.

19. The CKP of anyone of claims 1-16, whereininL2,Xi isK,X2 is Q,X3 isD,X4 is S, and X5 is D.

20. The CKP of any one of claim 1-4, wherein L has the structure XX 2 X3 X 4 X 6 X7 X 5 X

(SEQ ID NO: 4), and wherein: Xs is P; X7 is W; X 8 is G; and wherein Xi, X2, X3, X 4 and X 6 are each any amino acid, with the exception that X1 is not P, X2 is not R, X 3 is not I, and/or X6 is not R.

21. The CKP of any one of claims 1-5 and 18, wherein Li has the structure XiX2X3X4X5X6X7X (SEQ ID NO: 4), and wherein: Xi is an amino acid selected from N and D; X2 is an amino acid selected from I and V; X 3 is an amino acid selected from M and L; X 4 is an amino acid selected from L, Q, D and K; Xs is P; X 6 is an amino acid selected from F, Y, T, L, and M; X 7 is W; and X8 is G.

22. The CKP of any one of claims 14-15 and 20-21, wherein in L5: Xi is an amino acid selected from Q, H, L, and R; X2 is an amino acid selected from Y and W; X3 is Y; X 4 is an amino acid selected from Q and N; and X 5 is S.

23. The CKP of claim 14-15 and 20-22, wherein in L5: X3 is Y; X 5 is S; and wherein Xi, X2 , and X 4 are each any amino acid, with the exception that:

Xi is not G,X2 is not P, and/or X4 is not G.

24. The CKP of claim 20-23, wherein in L2: Xi is an amino acid selected from G or E; X 2 is an amino acid selected from Q, L, P, R, E, and M; X3 is an amino acid selected from S, D, and N; X 4 is an amino acid selected from F, Y, L, M, and I; and/or X 5 is an amino acid selected from E, D, Q, L, and S.

25. The CKP of any of claims 1-22, wherein in L3, Xi is L, X2 is A, and X3 is G.

26. The CKP of any of claims 1-23, wherein in L4, X1 is V or F.

27. The CKP of any one of claims 1-7, 11-12, 14, 17, 19-21, and 24-26, wherein in L5, each of Xi - X5 is any amino acid with the exception that X 2 is not proline (P).

28. The CKP of anyone of claims 1-7, 11-12, 14, 17, 19-21, and 24-26 wherein in L5, each of Xi - X5 is any amino acid with the exception that X 4 is not glycine (G).

29. The CKP of any one of claims 1-7, 11-12, 14, 17, 19-21, and 24-28, wherein in L5: Xi is any amino acid except G; X2 is any amino acid except P; X3 is any amino acid except N; X 4 is any amino acid except G; and/or X 5 is any amino acid except F.

30. The CKP of any one of claims 1-5, wherein L has the structure XX2 X 3 X 4 XX6X 7X (SEQ ID NO: 4), and wherein: Xi is an amino acid selected from N, D, and X; X2 is an amino acid selected from I, V, and X; X3 is M or X; X 4 is an amino acid selected from L, Q, and X; X 5 is P or X; X6 is F, Y, or X;

X 7 is W or X; and X 8 is G or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4 dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2 pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4 methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

31. The CKP of claim 28, wherein in L3, each of Xi- X 3 is any amino acid orunnatural amino acid with the exception that Xi is not Leucine (L), X 2 is not Alanine (A), and X 3 is not glycine (G), wherein the unnatural amino acid selected from the group consisting of L propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4 dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2 pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4 methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

32. The CKP of claim 28 or claim 29, wherein inL3: Xi is an amino acid selected from M, F, L V, and X; X 2 is an amino acid selected from S, N, Q, I, Y, E, V, T, and X; X 3 is an amino acid selected from D, Q, T, N, E, R, and X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3 fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2 naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2 ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

33. The CKP of any one of claims 28-30, wherein in L4, Xi is any amino acid except V or an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

34. The CKP of any one of claims 28-31, wherein in L4, Xi is I, L, or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2 chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L-proline, 4-[4 (trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4-dichloro-L phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2-pyridone(NH para)-L alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza-indole)-L-alanine, 4-methyl L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4-methyl-2-pyridyl-alanine, 4 ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3 isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L-Nepentyl glycine), 3-cyclobutyl L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl

L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

35. The CKP of any one of claims 28-32, wherein in L5: X3 is Y or X; X5 is S or X; and wherein Xi, X2, and X4 are each any amino acid or X, with the exception that Xi is not G, X2 is not P, and/or X4 is not G, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1 naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4 fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH L-proline, 4-fluoro-L-proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L phenylalanine, 3,4-dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L phenylalanine, 2-pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N methyl indole)-L-alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L alanine, 3-(5-aza-indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4' biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl) L-alanine, 4-methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

36. The CKP of any one of claims 1-7, 11-12, 14, 17, 19-21, and 24-26, wherein in L5, each of Xi - X5 is any amino acid with the exception that X 2 is not proline (P).

37. The CKP of anyone of claims 1-7, 11-12, 14, 17, 19-21, and 24-26 wherein in L5, each of Xi - X5 is any amino acid with the exception that X 4 is not glycine (G).

38. The CKP of any one of claims 28-33, wherein in L5: Xi is an amino acid selected from Q, H, and X; X2 is an amino acid selected from Y, W, and X; X3 is Y or X; X 4 is an amino acid selected from Q, N, or X; X5 is S or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4 dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2 pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4 methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

39. The CKP of any one of claims 28-34, wherein in L2: Xi is G or X; X2 is R, P, or X; X3 is D or X; X4 is F, I, or X; and X 5 is E, D, or X, wherein X is an unnatural amino acid selected from the group consisting of L-propargylglycine-PEG6-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2-naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4 dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2 pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4 methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide.

40. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECLQQCICQYYQSCG (SEQ ID NO: 103).

41. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECVERCICQYYQSCG (SEQ ID NO: 104).

42. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 105).

43. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECMNQCICQYYQSCG (SEQ ID NO: 106).

44. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECMQTCICQYYQSCG (SEQ ID NO: 107).

45. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECVYQCICQYYQSCG (SEQ ID NO: 108).

46. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECFINCICQYYQSCG (SEQ ID NO: 109).

47. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 110).

48. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECVTECICQYYQSCG (SEQ ID NO: 111).

49. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECFYECICQYYQSCG (SEQ ID NO: 112).

50. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 113).

51. The CKP of anyone of claims 28-35, comprising the amino acid sequence GCNIMLPFWGCGRDFECVYRCICQYYQSCG (SEQ ID NO: 114).

52. The CKP of any one of claims 28-35, comprising the amino acid sequence GCDVMQPYWGCGPDIDCFVRCLCHWYNSCG (SEQ ID NO: 139).

53. The CKP of any one of claims 28-35, comprising the amino acid sequence GCDVMQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 140).

54. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIMLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 142).

55. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIXLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 144), wherein X is norleucine (Nle).

56. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIXLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 145), wherein X is norleucine (Nle).

57. The CKP of any one of claims 28-35, comprising the amino acid sequence GCNIXLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 146), wherein X is norleucine (Nle).

58. The CKP of any one of claims 28-35, comprising the amino acid sequence GCDVXQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 224), wherein X is norleucine.

59. A non-naturally occurring cystine knot peptide (CKP) comprising an amino acid selected from the group consisting of: GCNIMLPFWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 113), GCNIMLPFWGCGRDFECVYRCICQYYQSCG (SEQ ID NO: 114), GCDVMQPYWGCGPDIDCFVRCLCHWYNSCG (SEQ ID NO: 139), GCDVMQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 140), GCNIMLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 142), GCNIXLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 144), wherein X is norleucine (Nle), GCNIXLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 145), wherein X is norleucine (Nle), GCNIXLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 146), wherein X is norleucine (Nle), and GCDVXQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 224), wherein X is norleucine.

60. The CKP of claim 59, comprising the amino acid sequence set forth in GCNIMLPFWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 113).

61. The CKP of claim 59, comprising the amino acid sequence set forth in GCNIMLPFWGCGRDFECVYRCICQYYQSCG (SEQ ID NO: 114).

62. The CKP of claim 59, comprising the amino acid sequence set forth in GCDVMQPYWGCGPDIDCFVRCLCHWYNSCG (SEQ ID NO: 139).

63. The CKP of claim 59, comprising the amino acid sequence set forth in GCDVMQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 140).

64. The CKP of claim 59, comprising the amino acid sequence set forth in GCNIMLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 142).

65. The CKP of claim 59, comprising the amino acid sequence set forth in GCNIXLPFWGCGRDFECMSDCICQYYQSCG (SEQ ID NO: 144), wherein X is norleucine (Nle).

66. The CKP of claim 59, comprising the amino acid sequence set forth in GCNIXLPFWGCGRDFECVSQCICQYYQSCG (SEQ ID NO: 145), wherein X is norleucine (Nle).

67. The CKP of claim 59, comprising the amino acid sequence set forth in GCNIXLPYWGCGRDFECMEQCICQYYQSCG (SEQ ID NO: 146), wherein X is norleucine (Nle).

68. The CKP of claim 59, comprising the amino acid sequence set forth in GCDVXQPYWGCGPDIDCLSNCICHWYNSCG (SEQ ID NO: 224), wherein X is norleucine.

69. The CKP of any one of claims 59-68, wherein the CKP binds VEGF-A.

70. A non-naturally occurring cystine knot peptide (CKP) comprising an amino acid selected from the group consisting of: GCDVXiQPYWGCGPDI-D/E-CLS-N/K/X2 CICHWYNSCG (SEQ ID NO: 534), GCDVXiQPYWGCGPDI-N/K/X2-CLS-D/E CICHWYNSCG (SEQ ID NO: 535), GCNIXiLPYWGCGRDF-D/E-CME-N/K/X2 CICQYYQSCG (SEQ ID NO: 538), GCNIXiLPYWGCGRDF-N/K/X2-CME-D/E CICQYYQSCG (SEQ ID NO: 539), GCNIXiLPFWGCGRDF-D/E-CVS-N/K/X2 CICQYYQSCG (SEQ ID NO: 540), and GCNIXiLPFWGCGRDF-N/K/X2-CVS-D/E CICQYYQSCG (SEQ ID NO: 541), wherein Xi is norleucine and X 2 is ornithine.

71. The CKP of claim 70, comprising the amino acid sequence set forth in GCDVXiQPYWGCGPDI-D/E-CLS-N/K/X2-CICHWYNSCG (SEQ ID NO: 534), wherein Xi is norleucine and X2 is ornithine.

72. The CKP of claim 71, comprising the amino acid sequence set forth in GCDVXQPYWGCGPDIDCLSKCICHWYNSCG (SEQ ID NO: 536), wherein X is norleucine.

73. The CKP of claim 71, comprising the amino acid sequence set forth in GCDVXiQPYWGCGPDIDCLSX2CICHWYNSCG (SEQ ID NO: 537), wherein Xi is norleucine and X 2 is ornithine.

74. The CKP of claim 70, comprising the amino acid sequence set forth in GCDVXiQPYWGCGPDI-N/K/X2-CLS-D/E-CICHWYNSCG (SEQ ID NO: 535), wherein Xi is norleucine and X2 is ornithine.

75. The CKP of claim 70, comprising the amino acid sequence set forth in GCNIXiLPYWGCGRDF-D/E-CME-N/K/X2-CICQYYQSCG (SEQ ID NO: 538), wherein Xi is norleucine and X2 is ornithine.

76. The CKP of claim 75, comprising the amino acid sequence set forth in GCNIXLPYWGCGRDFECMEKCICQYYQSCG (SEQ ID NO: 543), wherein X is norleucine.

77. The CKP of claim 75, comprising the amino acid sequence set forth in GCNIXiLPYWGCGRDFECMEX2CICQYYQSCG (SEQ ID NO: 544), wherein Xi is norleucine and X 2 is ornithine.

78. The CKP of claim 70, comprising the amino acid sequence set forth in GCNIXiLPYWGCGRDF-N/K/X2-CME-D/E-CICQYYQSCG (SEQ ID NO: 539), wherein Xi is norleucine and X2 is ornithine.

79. The CKP of claim 70, comprising the amino acid sequence set forth in GCNIXiLPFWGCGRDF-D/E-CVS-N/K/X2-CICQYYQSCG (SEQ ID NO: 540), wherein Xi is norleucine and X2 is ornithine.

80. The CKP of claim 79, comprising the amino acid sequence set forth in GCNIXLPFWGCGRDFECVSKCICQYYQSCG (SEQ ID NO: 545), wherein X is norleucine.

81. The CKP of claim 79, comprising the amino acid sequence set forth in GCNIXiLPFWGCGRDFECVSX2CICQYYQSCG (SEQ ID NO: 546), wherein Xi is norleucine and X 2 is ornithine.

82. The CKP of claim 70, comprising the amino acid sequence set forth in GCNIXiLPFWGCGRDF-N/K/X2-CVS-D/E-CICQYYQSCG (SEQ ID NO: 541), wherein Xi is norleucine and X2 is ornithine.

83. The CKP of any one of claims 70-82, wherein the CKP binds VEGF-A.

84. A non-naturally occurring cystine knot peptide (CKP) that binds to VEGF-A, wherein the CKP comprises the cystine scaffold structure:

ZiCiL1C2L2C3L3C4L4CL5C6Z2

wherein: Zi and Z 2 are any amino acid, more than one amino acid, or an unnatural amino acid; Li is Loop 1 and has a structure selected from the group consisting of: XiX2X3X4X5X6X7X, XiX 2X 3 X 4 X 5X 6X 7 X 8X9 , and XiX 2 X 3 X4 X 5X 6X 7X 8X 9Xio, wherein each

of Xi - Xio is any amino acid or an unnatural amino acid; L2 is Loop 2 and has the structure: XiX2X3X4X, wherein each of Xi - X5 is any amino acid or an unnatural amino acid; L3 is Loop 3 and has the structure: XiX 2 X 3 wherein each of Xi - X3 is any amino acid or an unnatural amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid or an unnatural amino acid;L5 is Loop 5 and has the structure: XiX2 X 3X 4 X, wherein each of Xi - X5 is any amino acid or an unnatural amino acid; wherein the unnatural amino acid selected from the group consisting of L propargylglycine-PEG-, L-sulfotyrosine, L-norleucine, L-1-naphthylalanine, L-2 naphthylalanine, L-2-chlorotryptophan, L-3-fluorotyrosine, L-4-fluorophenylalanine, gamma-benzyl-L-proline, gamma-(4-fluoro-benzyl)-L-proline, 4-OH-L-proline, 4-fluoro-L proline, 4-[4-(trifluoromethyl)-benzyl]-L-proline, 3,4-difluoro-L-phenylalanine, 3,4 dichloro-L-phenylalanine, 4-chloro-L-phenylalanine, 3-F,4-Cl-L-phenylalanine, 2 pyridone(NH para)-L-alanine, pyridone(NH meta)-L-alanine, 3-(1-N-methyl indole)-L alanine, 3-(1-N-ethyl indole)-L-alanine, 3-(1-N-isopropyl indole)-L-alanine, 3-(5-aza indole)-L-alanine, 4-methyl-L-phenylalanine, 2-naphthyl-L-alanine, L-4,4'-biphenylalanine, 3-(3-quinolinyl)-L-alanine, 3-(2-quinolinyl)-L-alanine, 3-(2-quinoxalinyl)-L-alanine, 4 methyl-2-pyridyl-alanine, 4-ethyl-2-pyridyl-L-alanine, benzothiazole-L-alanine, benzothiophene-L-alanine, 3-isoquinolinyl-L-alanine, t-butyl-L-alanine (also known as L Nepentyl glycine), 3-cyclobutyl-L-alanine, cyclopentyl-L-alanine, 5,5,5-Trifluoro-L-leucine, t-butyl-L-glycine (also known as L-tert-Leucine), L-cyclopentylglycine, L-cyclobutylglycine, 3,4-hydroxy-L-phenylalanine, 3,4-fluoro-L-phenylalanine, 3-fluoro,4-OH-L-phenylalanine, 2-chloro-L-tyrosine, 2-methyl-L-tyrosine, 2-ethyl-L-tyrosine, 4-(naphthalen-1-ol)-L-alanine, D-serine, L-beta-homoserine, L-beta-alanine, N-alpha-methyl glycine, glycine amide, glycine ester of glycerol, glycine ester of glycol, glycine ester of oxetane-3-yl, and glycine morpholine amide, and wherein the CKP has an altered disulfide bond connectivity with reference to a wild type Ecballium elaterium trypsin inhibitor EETI-II protein having the amino acid sequence set forth in SEQ ID NO: 1; wherein the altered disulfide bond connectivity is C1-C4, C2-C3 and C5-C6; and wherein the CKP has a percent alpha helix content of at least 20%.

85. The CKP of claim 84, wherein the CKP binds to VEGF-A with an affinity of 500 pM or less.

86. The CKP of claims 1-58 and 84-85, wherein the binding affinity is determined via surface plasmon resonance.

87. The CKP of any one of claims 84-86, wherein in L5, each of Xi - X5 is any amino acid with the exception that X2 is not proline (P).

88. The CKP of any one of claims 84-86, wherein in L5, each of Xi - X5 is any amino acid with the exception that X4 is not glycine (G).

89. The CKP of any one of claims 1-88, wherein: (a) the C-terminal carboxyl group of the peptide is capped; (b) the N-terminal amine of the peptide (CKP) is capped; or

(c) the C-terminal carboxyl group and the N-terminal amine of the peptide (CKP) is capped.

90. The CKP of claim 89, wherein: (a) the C-terminal carboxyl group of the peptide is amidated; (b) the N-terminal amine of the peptide (CKP) is acetylated; or (c) the C-terminal carboxyl group of the peptide is amidated and the N-terminal amine of the peptide (CKP) is acetylated.

91. The CKP of anyone of claims 1-90, wherein the CKP inhibits VEGF-A activity.

92. The CKP of claims 1-91, wherein the CKP inhibits VEGF-A activity with and IC5o between about 0.5 nM and about 1.0 nM.

93. The CKP of any one of claims 1-92, wherein the non-naturally occurring EETI-II scaffold protein binds human VEGF-A, mouse VEGF-A, and rat VEGF-A.

94. A non-naturally occurring CKP that competes with the antibody G6.31 for binding to VEGF-A.

95. A non-naturally occurring CKP that competes with the CKP of any one of claims 1-94 for binding to VEGF-A.

96. A non-naturally occurring CKP that binds to an epitope on VEGF-A comprising at least one of the amino acid residues selected from the group consisting of: V14, V15, F17, D19,Y21, Q22, Y25,146, K48, N62, D63, L66, M81,183, K84, P85, H86, G88, Q89,191, C104, R105, and P106.

97. The CKP of claim 96, wherein the residues are selected from the group consisting of: K48, N62, and D63.

98. The CKP of claim 96, wherein the residues are selected from the group consisting of: Y21, Y25, and P106.

99. The CKP of claim 96, wherein the residues are selected from the group consisting of: H86 and Q89.

100. The CKP of claim 96, wherein the residues are selected from the group consisting of: M81, D19, and Q22.

101. The CKP of claim 96, wherein the residues are selected from the group consisting of: F17, M81, and 191.

102. The CKP of claim 96, wherein the residues are selected from the group consisting of: V14, F17, D19, Q22, M81, and 191.

103. The CKP of claim 96, wherein the residues are selected from the group consisting of: Y25.

104. The CKP of any one of claims 1-103 conjugated to a therapeutic agent.

105. The CKP of any one of claims 1-103 conjugated to a label.

106. The CKP of claim 105, wherein the label is selected from the group consisting of a radioisotope, a fluorescent dye, and an enzyme.

107. An isolated nucleic acid encoding the CKP of any one of claims 1-103.

108. An expression vector encoding the nucleic acid molecule of claim 107.

109. A cell comprising the expression vector of claim 108.

110. A method of producing the CKP of any one of claims 1-103 comprising culturing the cell of claim 109 and recovering the CKP from the cell culture.

111. A method of producing the CKP of any one of claims 1-103, comprising chemically synthesizing the CKP.

112. A composition comprising the CKP of any one of claims 1-104 and a pharmaceutically acceptable carrier.

113. A method of treating an ocular disease characterized by angiogenesis and/or vascular permeability or leakage in a subject, comprising administering an effective amount of the CKP of any one of claims 1-104 or the composition of claim 112 to the subject.

114. The method of claim 113, wherein the ocular disease is an intraocular neovascular disease selected from the group consisting of proliferative retinopathies, choroidal neovascularization (CNV), age-related macular degeneration (AMD), diabetic and other ischemia-related retinopathies, diabetic macular edema, pathological myopia, von Hippel Lindau disease, histoplasmosis of the eye, retinal vein occlusion (RVO), including Central Retinal Vein Occlusion (CRVO) and branched retinal vein occlusion (BRVO), corneal neovascularization, retinal neovascularization, and retinopathy of prematurity (ROP).

115. The method of any one of claims 113 or 114, wherein the CKP or the composition is administered to the subject via an implantable device.

116. The method of claim 115, wherein the implantable device selected from the group consisting of: an ocular insert, a slow-release depot, an ocular plug/reservoir, an non biodegradable ocular implant or a biodegradable ocular implant.

117. A composition comprising the CKP of any one of claims 1-104, for use in treating an ocular disease characterized by angiogenesis and/or vascular permeability or leakage in a subject.

118. The composition for use according to claim 117, wherein the ocular disease is an intraocular neovascular disease selected from the group consisting of proliferative retinopathies, choroidal neovascularization (CNV), age-related macular degeneration (AMD), diabetic and other ischemia-related retinopathies, diabetic macular edema, pathological myopia, von Hippel-Lindau disease, histoplasmosis of the eye, retinal vein occlusion (RVO), including Central Retinal Vein Occlusion (CRVO) and branched retinal vein occlusion

(BRVO), corneal neovascularization, retinal neovascularization, and retinopathy of prematurity (ROP).

119. The composition for use according to claim 117 or 118, wherein the composition is administered to the subject via an implantable device.

120. The composition for use according to claim 119, wherein the implantable device selected from the group consisting of: an ocular insert, a slow-release depot, an ocular plug/reservoir, an non-biodegradable ocular implant or a biodegradable ocular implant.

121. Use of a composition comprising the CKP of any one of claims 1-104 for treating an ocular disease characterized by angiogenesis and/or vascular permeability or leakage in a subject.

122. The use according to claim 121, wherein the ocular disease is an intraocular neovascular disease selected from the group consisting of proliferative retinopathies, choroidal neovascularization (CNV), age-related macular degeneration (AMD), diabetic and other ischemia-related retinopathies, diabetic macular edema, pathological myopia, von Hippel-Lindau disease, histoplasmosis of the eye, retinal vein occlusion (RVO), including Central Retinal Vein Occlusion (CRVO) and branched retinal vein occlusion (BRVO), corneal neovascularization, retinal neovascularization, and retinopathy of prematurity (ROP).

123. The use according to claim 121 or 122, wherein the medicament is administered to the subject via an implantable device.

124. The use according to claim 123, wherein the implantable device selected from the group consisting of: an ocular insert, a slow-release depot, an ocular plug/reservoir, an non biodegradable ocular implant or a biodegradable ocular implant.

125. The CKP of any one of claims 1-104, wherein the CKP is formulated for long acting delivery.

126. A formulation comprising the CKP of any of claims 1-104 and PLGA.

127. The formulation of claim 126, wherein the PLGA is a PLGA rod.

128. A non-naturally occurring cystine knot peptide (CKP) that binds to human low density lipoprotein receptor-related protein 6 (LRP6), wherein the CKP comprises the cystine scaffold structure: ZiCiLlC2L2C3L3C4L4CL5C6Z2;

wherein: Zi and Z2 are any amino acid; Li is Loop1 and has a structure selected from the group consisting of: XIX2X3X4XX6,

XiX2X3X4X5X6X7, XiX2X3X4X5X6X7X8, XiX2X3X4XX6X7X8X9, and

XiX2X3X4X5X6X7X8X9XiO, wherein each of Xi - Xio is any amino acid; L2 is Loop 2 and has the structure: XX2X3X4X5, wherein each of Xi - X5 is any amino acid; L3 is Loop 3 and has the structure: XX2X3 wherein each of Xi - X 3 is any amino acid; L4 is Loop 4 and has the structure: Xi, wherein Xi is any amino acid; and L5 is Loop 5 and has the structure: XiX2X3X4X, wherein each of Xi - X5 is any amino acid.

129. The CKP of claim 128, wherein Zi and/or Z2 is G.

130. The CKP of any one of claims 128 or 129, wherein in LI: Xi is an amino acid selected from R, V, M, A, G, N, S, and E; X2 is an amino acid selected from T, N, S, G, R, and A; X 3 is an amino acid selected from N, R, H, V, K, S, G, I, and Y; X 4 is an amino acid selected from R, V, N, I, K, S, and T; X 5 is an amino acid selected from V, R, K, I, T, S, L, and N; and

X 6 is an amino acid selected from K, G, A, I, R, N, S, and V.

131. The CKP of anyone of claims 128-130, wherein inLi: X 7 is an amino acid selected from G, R, K, E, P, and T.

132. The CKP of anyone of claims 128-131, wherein inLi: X 8 is an amino acid selected from G, R, K, Q, A, and S.

186 17800220_1 (GHMatters) P108077.AU.1

133. The CKP of any one of claims 128-132, wherein in LI: X9 is an amino acid selected from R or G.

134. The CKP of any one of claims 128-133, wherein in Li: Xio is an amino acid selected from E, W, and G.

135. The CKP of any one of claims 128-134, wherein in L5: Xi is an amino acid selected from G, S, N, Y, A, and R; X2 is an amino acid selected from P, G, S, V, E, R, F, and D; X 3 is an amino acid selected from N, G, S, E, P, K, H, and R; X4 is an amino acid selected from G, R, H, S, Q, V, and D; and X 5 is an amino acid selected from F, D, N, R, G, Y, S, and T.

136. The CKP of any one of claims 128-135, wherein in L2, Xi is K, X2 is Q, X3 is D, X4 is S, and X5 is D.

137. The CKP of any one of claims 128-136, wherein in L3, Xi is L, X2 is A, and X3 is G.

138. The CKP of any one of claims 128-137, wherein in L4, Xi is V.

187 17800220_1 (GHMatters) P108077.AU.1